BRAINLIEST AND 100 POINTS!!

Answer:

-40

Step-by-step explanation:

8-(12*4)

you would multiply what is in the parenthesis first and then you would subtract! :D

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Over the time interval [2,5], the object traveled a distance of 450 meters.

To find the distance traveled over the time interval [0,2], we can use the formula for distance traveled, which is given by:

distance = velocity x time

Since the velocity is given by v(t) = 18t m/s, we can substitute t = 2 seconds to find the velocity at time t=2:
v(2) = 18(2) = 36 m/s

Now we can use this velocity and the time interval [0,2] to find the distance traveled:
distance = velocity x time
distance = 18t x t = 18t²

For t = 2 seconds, the distance traveled is:
distance = 18(2)² = 72 meters

Therefore, over the time interval [0,2], the object traveled a distance of 72 meters.

To find the distance traveled over the time interval [2,5], we can use the same formula, but this time we need to find the velocity at t=5 seconds:
v(5) = 18(5) = 90 m/s

Now we can use this velocity and the time interval [2,5] to find the distance traveled:
distance = velocity x time
distance = 18t x t = 18t²

For t = 5 seconds, the distance traveled is:
distance = 18(5)² = 450 meters

Therefore, over the time interval [2,5], the object traveled a distance of 450 meters.

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The double integral of 6 over the region in the first octant of the plane x + y + z = 1 is [missing].

To find the double integral, we need to determine the limits of integration. Since we are in the first octant, we have x ≥ 0, y ≥ 0, and z ≥ 0. We can rewrite the equation of the plane as z = 1 - x - y. The region of integration is bounded by the coordinate planes and the plane x + y + z = 1.

The limits for x and y are both from 0 to 1, and the limits for z are from 0 to 1 - x - y. Integrating the function 6 over this region will give us the desired result.

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The area of Mary Beth's rectangle is 289/16 square units.

To find the area of Mary Beth's rectangle, we need to multiply its length by its width. In this case, the length and width are both 4 1/4 units.

To calculate the area, we first need to convert 4 1/4 into an improper fraction. To do that, we multiply the whole number (4) by the denominator (4), and then add the numerator (1). This gives us a total of 17/4.

Now, to find the area, we multiply the length (17/4) by the width (17/4):

(17/4) * (17/4)

= (17 * 17) / (4 * 4)

= 289/16

Therefore, the area of Mary Beth's rectangle is 289/16 square units.

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To find the vector representing the path from plane A to plane B, we can subtract the coordinates of plane A from the coordinates of plane B.

The coordinates of plane A are (24, 18) and the coordinates of plane B are (8, 6).

Subtracting the coordinates:

Vector AB = (8 - 24, 6 - 18)

= (-16, -12)

Therefore, the vector representing the path from plane A to plane B is (-16, -12).

To find the actual distance between the planes, we can use the distance

formula:

Distance = √((x2 - x1)^2 + (y2 - y1)^2)

Using the coordinates of plane A (24, 18) and plane B (8, 6):

Distance = √((8 - 24)^2 + (6 - 18)^2)

= √((-16)^2 + (-12)^2)

= √(256 + 144)

= √400

= 20

Therefore, the actual distance between plane A and plane B is 20 units.

Given that the scale on the radar is 1 unit = 25 miles, the actual distance in miles would be:

Actual Distance = 20 units * 25 miles/unit

= 500 miles

So, the actual distance between plane A and plane B is 500 miles.

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The transmitted intensity i1 is approximately 19.32 watts per square meter.

An indicator of a physical phenomenon's strength or power, such as light, sound, or radiation, is its intensity. It is often expressed in terms of the quantity of energy being transmitted or received per unit area or volume. For instance, the intensity of light is expressed in watts per square metre, while the strength of sound is expressed in watts per square metre per hertz. Distance, direction, and the qualities of the medium through which the phenomenon is transmitted can all have an impact on intensity.

To find the transmitted intensity (i1), we need to use the formula:

[tex]i1 = i0 * cos(θ0 - θta)[/tex]

where i0 is the initial intensity, [tex]θ0[/tex]is the initial angle, and [tex]θta[/tex] is the transmitted angle.

Step 1: Calculate the difference between the angles:
[tex]Δθ = θ0 - θta[/tex] = 25.0 degrees - 40.0 degrees = -15.0 degrees

Step 2: Convert the angle difference to radians:
[tex]Δθ[/tex](in radians) = -15.0 degrees *[tex](\pi /180)[/tex] ≈ -0.2618 radians

Step 3: Calculate the cosine of the angle difference:
[tex]cos(Δθ) ≈ cos(-0.2618)[/tex]≈ 0.9659

Step 4: Calculate the transmitted intensity (i1):
i1 = i0 * [tex]cos(Δθ)[/tex] = 20.0[tex]W/m^2[/tex] * 0.9659 ≈ 19.32 [tex]W/m^2[/tex]

So, the transmitted intensity i1 is approximately 19.32 watts per square meter.

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To determine the optimal distance of the heat source from the vertex in a parabolic space heater, we'll use the given dimensions and the properties of parabolic reflectors.

The parabolic space heater is 24 inches in diameter and 12 inches deep. A parabolic reflector has the equation y = ax² where (x, y) are coordinates of a point on the parabola and "a" is a constant. Since the diameter is 24 inches, the width at the opening is 12 inches on each side. Let's find the value of "a" using the point (12, 12), where x=12 and y=12.

12 = a(12)²
12 = 144a
a = 12/144
a = 1/12

So the equation of the parabolic reflector is y = (1/12)x².

Now, we need to find the focal point, which is where the heat source should be placed to maximize heating output. The distance from the vertex to the focal point (called the focal length) is given by the formula:

Focal length = 1/(4a)

Plugging in the value of "a" we found earlier:

Focal length = 1/(4*(1/12))
Focal length = 1/(1/3)
Focal length = 3 inches

So, to maximize the heating output, place the heat source 3 inches from the vertex.

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Answer: 4

Step-by-step explanation:

lets call the height y

3^2 + y^2 = 5^2

9+y^2 = 25

y^2 = 25 = 9

y^2 = 16

y = 4

The correct interpretation of the 95% prediction interval for y shown on the printout is:

D) We are 95% confident that between 47.224 and 119.126 man-hours will be worked during a single day in which 7,781 pieces of mail are processed and 644 checks are cashed.

This interpretation is based on the fact that a prediction interval gives a range of values in which we expect to find the response variable (in this case, the number of man-hours worked) for a specific set of predictor variable values (in this case, 7,781 pieces of mail processed and 644 checks cashed) with a certain level of confidence (in this case, 95%).

So, we can be 95% confident that the actual number of man-hours worked during a single day with these specific values of x1 and x2 falls between the lower and upper limits of the prediction interval, which are given as 47.224 and 119.126, respectively, in the printout.

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The y intercept of the line fraction numerator 6y + 2x over denominator 5 equals 18 is (0,18), where the x-coordinate is 0 and the y-coordinate is 18.


To find the y-intercept, we need to plug in x = 0 into the equation of the line. When we do this, we get:

fraction numerator 6y + 2(0) over denominator 5 end fraction = 18

Simplifying this, we get:

6y/5 = 18

Multiplying both sides by 5/6, we get:

y = 15

So the y-intercept is the point (0,15). However, the problem is asking for the line in fraction form, so we need to express this as a fraction. The equation of the line can be written as:

fraction numerator 6y + 2x over denominator 5 end fraction = fraction numerator 6(15) + 2(0) over denominator 5 end fraction = 18

So the y-intercept of the line fraction numerator 6y + 2x over denominator 5 equals 18 is (0,18).

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The equation of the plane passing through the given points is 3x+3z=3.

To find the equation of the plane passing through three non-collinear points, we first need to find two vectors lying on the plane. Let's take two vectors PQ and PR, which are given by:

PQ = Q - P = (2-3, 2-2, 5-2) = (-1, 0, 3)

PR = R - P = (-5-3, 2-2, 2-2) = (-8, 0, 0)

Next, we take the cross product of these vectors to get the normal vector to the plane:

N = PQ x PR = (0, 24, 0)

Now we can use the point-normal form of the equation of a plane, which is given by:

N · (r - P) = 0

where N is the normal vector to the plane, r is a point on the plane, and P is any known point on the plane. Plugging in the values, we get:

(0, 24, 0) · (x-3, y-2, z-2) = 0

Simplifying this, we get:

24y - 72 = 0

y - 3 = 0

Thus, the equation of the plane in scalar form is:

3x + 3z = 3

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D is a common divisor of a and b, and any common divisor of a and b must divide d. Thus, d is a greatest common divisor of a and b, as required.

To prove that any two nonzero elements of a PID R have a greatest common divisor, let a and b be nonzero elements of R.

First, we note that since R is a PID, it is a UFD (unique factorization domain), and so both a and b have unique factorizations into irreducible elements (i.e., primes) up to units and order.

We define the ideal (a, b) generated by a and b as the set of all elements of the form ra + sb, where r and s are arbitrary elements of R. Since R is a PID, (a, b) is a principal ideal, i.e., (a, b) = (d) for some element d in R.

Now, we claim that d is a greatest common divisor of a and b. To see this, note that d divides both a and b, since a and b are both elements of (d). In other words, there exist elements x and y in R such that a = dx and b = dy. Moreover, any common divisor of a and b must also divide d, since if c divides both a and b, then c also divides any element of the form ra + sb in (a, b), and hence c divides d.

Therefore, d is a common divisor of a and b, and any common divisor of a and b must divide d. Thus, d is a greatest common divisor of a and b, as required.

Therefore, we have shown that any two nonzero elements of a PID R have a greatest common divisor.

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Let R be a principal ideal domain (PID), and let a, b be nonzero elements of R. We need to show that a greatest common divisor (gcd) of a and b exists in R.

Let I be the ideal of R generated by a and b. Since R is a PID, I is a principal ideal, say I = (d) for some element d of R. We claim that d is a gcd of a and b.

First, we show that d is a common divisor of a and b. Since a and b are both in I, they are both multiples of d. Specifically, a = md and b = nd for some elements m, n of R. Therefore, d divides both a and b, and so d is a common divisor of a and b.

Next, we show that d is a greatest common divisor of a and b. Suppose c is another common divisor of a and b. Then c is also a multiple of d, since d generates the ideal (d) containing a and b. Specifically, c = kd for some element k of R. We need to show that d divides c, which would imply that d is a common divisor of a and b that is greater than or equal to c.

Since c is a common divisor of a and b, we have a = xc and b = yc for some elements x, y of R. Substituting c = kd, we obtain a = xkd and b = ykd. Since d is a generator of the ideal (d), it follows that d divides xk and yk. Since R is a domain (meaning that it has no zero divisors), it follows that d divides x and y individually. Therefore, a = xd' and b = yd' for some element d' of R, where d' = xd/gcd(x,y) = yd/gcd(x,y) is another common divisor of a and b. Since gcd(x,y) is a divisor of both x and y, it follows that gcd(x,y) divides d', and therefore d divides d'. This completes the proof that d is a greatest common divisor of a and b.

Therefore, we have shown that any two nonzero elements of R have a greatest common divisor.

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the volume of grain that the storage can hold is approximately 12.87 cubic meters

Given that 1 yard is approximately equal to 0.9144 m.

Therefore, 16.8 cubic yards of grain can be converted to cubic meters by multiplying it by the conversion factor as shown below:

We know that ,  1 yard is approximately equal to 0. 9144 m to convert this volume to m3

16.8 cubic yards of grain = 16.8 x 0.9144 x 0.9144 x 0.9144

cubic meters of grain= approximately 12.87 cubic meters of grain

Therefore, the volume of grain that the storage can hold is approximately 12.87 cubic meters.

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1. the answer is the vector [-11 -9] and 2. The answer is the vector [-30 -24].

First, let's recall the definition of eigenvectors and eigenvalues. An eigenvector of a matrix A is a non-zero vector v such that when A is multiplied by v, the result is a scalar multiple of v. That scalar multiple is called the eigenvalue corresponding to that eigenvector. In other words, if v is an eigenvector of A with eigenvalue λ, then Av = λv.
Now, let's use this definition to answer your questions.
1. A(v1+v2) = Av1 + Av2 = λ1v1 + λ2v2. Substituting in the given values of λ1, λ2, v1, and v2, we get:
A(v1+v2) = 3[-5 -4] + (-1)[-4 -3]
= [-15 -12] + [4 3]
= [-11 -9]
So the answer is the vector [-11 -9].
2. A(-2v1) = -2Av1 = -2λ1v1. Substituting in the given value of λ1 and v1, we get:
A(-2v1) = -2(3)[-5 -4]
= [-30 -24]
So the answer is the vector [-30 -24].

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1.the answer is the vector [-11  -9] and  2.The answer is the vector [-30  -24].

Since [tex]v_{1}[/tex] and [tex]v_{2}[/tex] are eigenvectors of matrix A, we know that:
A [tex]v_{1}[/tex] = λ1 [tex]v_{1}[/tex]
A [tex]v_{2}[/tex] = λ2 [tex]v_{2}[/tex]
Let's use this information to solve the given problems:
1. A( [tex]v_{1}[/tex] + [tex]v_{2}[/tex] ) = A [tex]v_{1}[/tex]  + A [tex]v_{2}[/tex] = λ1 [tex]v_{1}[/tex] + λ2 [tex]v_{2}[/tex]
Substituting the values of λ1, [tex]v_{1}[/tex] , λ2, [tex]v_{2}[/tex] and  that were given:

A( [tex]v_{1}[/tex] + [tex]v_{2}[/tex] ) = 3[-5  -4] + (-1)[-4  -3]
= [-15  -12] + [4 3] = [-11  -9]
So the answer is the vector [-11  -9].
2. A(-2[tex]v_{1}[/tex] ) = -2 A [tex]v_{1}[/tex]
Using the given equation for A [tex]v_{1}[/tex] , we get:
A(-2[tex]v_{1}[/tex] ) = -2 λ1 [tex]v_{1}[/tex]
Substituting the values of λ1 and [tex]v_{1}[/tex]  that were given:

A(-2[tex]v_{1}[/tex]) = -2(3)[-5  -4] = [30  24]
So the answer is the vector [30  24].

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Therefore, the lawn chair cost $9.14.

Nina gave the cashier $9.85 and received $0.71 in change after buying a lawn chair.

To find out the cost of the lawn chair, we can subtract the change she received from the total amount she paid.

$9.85 - 0.71 = 9.14$

When you are shopping, the cashier is the person responsible for handling your payments. The cashier receives the payment and gives you change if you have overpaid. In this particular problem, Nina gave the cashier $9.85 to pay for the lawn chair she was buying. The cost of the lawn chair is the difference between the amount Nina gave to the cashier and the amount of change she received. Therefore, we can say that the lawn chair cost $9.14 because that is the difference between the amount she paid and the change she received.

In general, cashiers play a crucial role in the sales process. They provide an important service by handling payments, ensuring that customers pay the right amount for what they are buying, and by providing change when necessary. Without cashiers, customers would need to handle payments themselves, which would be inconvenient and could lead to errors.

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System 7: The system has a unique solution for any value of s.

System 8: The system has a unique solution for any value of s.

System 9: The system has a unique solution for all values of s except for s=5. , System 10: The system has a unique solution for any value of s.

The system has a unique solution for any value of s because the first equation is linear in x1 and the second equation is linear in x2.

The system has a unique solution for any value of s because both equations are linear and there are no dependencies or inconsistencies.

The system has a unique solution if s is not equal to 5. For s = 5, the system becomes inconsistent and has no solution.

The system has a unique solution for any value of s because all equations are linear and there are no dependencies or inconsistencies.

for systems 7, 8, and 10, a unique solution exists for all values of s. For system 9, a unique solution exists for all values of s except for s = 5, where the system becomes inconsistent. The specific solutions for each system can be found by solving the simultaneous equations using methods such as substitution or matrix operations.

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Thus, the interquartile range (IQR) for the salaries of U.S. marketing managers is 22,051. This means that the middle 50% of salaries for marketing managers in the U.S. lie within a range of $22,051, between $69,699 and $91,750.

The interquartile range (IQR) is a measure of variability that indicates the spread of the middle 50% of a dataset. To calculate the IQR, we need to subtract the first quartile (Q1) from the third quartile (Q3).

The five number summary you provided includes the minimum (min), first quartile (Q1), median, third quartile (Q3), and maximum (max) salaries of U.S. marketing managers.

To find the interquartile range (IQR), we need to focus on the values for Q1 and Q3.

The IQR is a measure of statistical dispersion, which represents the difference between the first quartile (Q1) and the third quartile (Q3). In simpler terms, it tells us the range within which the middle 50% of the data lies.

Using the values you provided:
Q1 = 69,699
Q3 = 91,750

To calculate the IQR, subtract Q1 from Q3:
IQR = Q3 - Q1
IQR = 91,750 - 69,699
IQR = 22,051

So, the interquartile range (IQR) for the salaries of U.S. marketing managers is 22,051. This means that the middle 50% of salaries for marketing managers in the U.S. lie within a range of $22,051, between $69,699 and $91,750.

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Let x be the amount charged for supplies.

The total amount charged is equal to the sum of the amount charged per hour and the amount charged for supplies.

Mathematically, this can be written as;

15.10(5) + x = 155.86

Therefore,

15.10(5) + x = 155.86

Performing the calculation;

15.10(5) + x = 155.86

1.50(5) + 0.10(5) + x = 155.86

27.50 + x = 155.86

Solving for x,

x = 155.86 - 27.50

x = $128.36

Therefore, the cost of supplies is $128.36.

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Different length p sequences of beads can be strung together are [tex]a^{p}[/tex].

Sequences of beads which contain at least two different colors is [tex]a^{p}[/tex] - a.

Rotating S clockwise t times implies different string of beads for each t.

Using Fermat's Little Theorem we have  [tex]a^{p}[/tex] - a is a multiple of p,

For each of the p positions, there are a choices for which color to use.

Therefore, the total number of different length p sequences of beads is [tex]a^{p}[/tex]

The number of sequences of beads that use only one color is a.

Since there are a choices for which color to use, and every bead must be of that color.

Therefore, the number of sequences of beads that contain at least two colors is [tex]a^{p}[/tex] - a.

Let S be a string of p beads with at least two colors, and let t be a positive integer less than p.

Show that rotating S clockwise t times yields a different string of beads for each value of t.

Suppose, for the sake of contradiction,

That rotating S clockwise t times yields the same string of beads as rotating it clockwise s times, where 0 ≤ t < s < p.

Then the first s-t beads are the same in both rotations.

But since p is prime, s-t has a multiplicative inverse modulo p, say r.

Then if we rotate S clockwise r times, the first r(s-t) beads are the same as the first r(s-t) beads when rotating S clockwise 0 times.

Which means they are all the same color.

This contradicts the assumption that S has at least two colors.

Therefore, rotating S clockwise t times yields a different string of beads for each value of t.

Let a be an integer greater than 1, and let p be a prime number. We want to show that [tex]a^{p}[/tex] - a is a multiple of p.

Consider the set of all bracelets made from p beads.

Each of which is either colored a or not colored a.

By part (b), the number of such bracelets is [tex]a^{p}[/tex] - a.

By part (c), each bracelet corresponds to exactly p distinct strings of beads.

Therefore, the total number of distinct strings of beads is [tex]a^{p-1}[/tex] - 1.

By the Division Rule, [tex]a^{p-1}[/tex]- 1 is a multiple of p if and only if [tex]a^{p}[/tex] - a is a multiple of p.

Therefore, we have shown that [tex]a^{p}[/tex] - a is a multiple of p, which is Fermat's Little Theorem.

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The area of the trapezoid is 30x + 42. Option C

The formula for calculating the area of a trapezoid is expressed as;

A = 1/2h(b1+b2)

Such that the parameters are enumerated as;

Now, substitute the values, we get;

Area = 1/2 × 12(2x + 3 + 3x + 4)

collect the like terms, we have;

Area = 6(5x + 7)

Expand the bracket, we get;

Area = 30x + 42

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The expected value and variance of

E(Y) = 0

Var(Y) = 1

We can start by finding the expected value of Y:

E(Y) = E[(X - µx) / δx]

Using the linearity of expectation, we can rewrite this as:

E(Y) = (1 / δx) × E(X - µx)

Now, E(X - µx) is simply the expected deviation of X from its mean, which is 0. Therefore:

E(Y) = (1 / δx) × 0 = 0

So the expected value of Y is 0.

Next, let's find the variance of Y:

Var(Y) = Var[(X - µx) / δx]

Using the property Var(aX) = a2Var(X) for any constant a, we can rewrite this as:

Var(Y) = (1 / δx2) × Var(X - µx)

Expanding this expression, we get:

Var(Y) = (1 / δx2) × [Var(X) - 2Cov(X, µx) + Var(µx)]

Since Var(µx) = 0 (because µx is a constant), this simplifies to:

Var(Y) = (1 / δx2) ×[Var(X) - 2Cov(X, µx)]

Now, we know that Var(X) = δ2x (the square of the standard deviation), and Cov(X, µx) = 0 (because µx is a constant). Therefore:

Var(Y) = (1 / δx2) × [δ2x - 2(0)] = 1

So the variance of Y is 1.

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To find the expected value of Y, we use the linearity of expectation. The expected value of Y is 0 and the variance of Y is 1.

E(Y) = E(X - µx / δx)
    = E(X) - E(µx / δx)    (since E(aX) = aE(X))
    = µx - µx / δx         (since E(c) = c for any constant c)
    = µx(1 - 1/δx)

To find the variance of Y, we use the properties of variance:

Var(Y) = Var(X - µx / δx)
         = Var(X) + Var(µx / δx) - 2Cov(X, µx / δx)    (since Var(aX + bY) = a^2Var(X) + b^2Var(Y) + 2abCov(X, Y))
         = Var(X) + 0 - 2(µx/δx)Var(X) / δx    (since Cov(X, c) = 0 for any constant c)
         = δ^2x - 2µx(δ^2x) / δ^3x
         = δ^2x(1 - 2/δx)

Given a random variable X with expected value µx and variance δ^2x, the expected value and variance of Y = (X - µx) / δx are as follows:

Expected value of Y:
E(Y) = E((X - µx) / δx) = (E(X) - µx) / δx = (µx - µx) / δx = 0

Variance of Y:
Var(Y) = Var((X - µx) / δx) = (1/δ^2x) * Var(X) = (1/δ^2x) * δ^2x = 1

Therefore, the expected value of Y is 0 and the variance of Y is 1.

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The regular price of each frozen meal was $10.

Joe paid a total of $56 for 7 frozen meals. he had a coupon for $2 off the regular price of each meal. each meal had the same regular price. Let x be the regular price of each meal. There are 7 frozen meals, and Joe had a coupon for $2 off the regular price of each meal. Therefore, Joe paid 7 * (x - 2) = $56 Combining like terms:7 * x - 14 = 56Add 14 to each side7 * x = 70.Divide each side by 7x = 10

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The value of tan(G/24) can be expressed as a fraction in simplest terms, but without knowing the specific value of G, we cannot determine the exact fraction.

To express tan(G/24) as a fraction in simplest terms, we need to know the specific value of G. Without this information, we cannot provide an exact fraction.

However, we can explain the general process of simplifying the fraction. Tan is the ratio of the opposite side to the adjacent side in a right triangle. If we have the values of the sides in the triangle formed by G/24, we can simplify the fraction.

For example, if G/24 represents an angle in a right triangle where the opposite side is 'O' and the adjacent side is 'A', we can simplify the fraction tan(G/24) = O/A by reducing the fraction O/A to its simplest form.

To simplify a fraction, we find the greatest common divisor (GCD) of the numerator and denominator and divide both by it. This process reduces the fraction to its simplest terms.

However, without knowing the specific value of G or having additional information, we cannot determine the exact fraction in simplest terms for tan(G/24).

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The domain of f(x) = tan(sin⁻¹(x)⁵/⁹) is [-1,1].

The function sin⁻¹(x) is also known as the inverse sine function or arcsin(x). This function takes an input value x and returns the angle whose sine is x. The range of arcsin(x) is [-π/2, π/2], which means that the input x must be between -1 and 1 in order to have a real output.

Next, we have (sin⁻¹(x))⁵/⁹, which means we are taking the fifth root of the arcsin function. This will give us another function that has a domain of [-1,1] because we can only take the nth root of a non-negative number.

Finally, we have the tangent function applied to (sin⁻¹(x))⁵/⁹. The tangent function is defined for all real numbers except for values where the cosine is equal to zero, which happens at odd multiples of π/2. However, because we are taking the fifth root of the arcsin function, we are only considering values of x that are between -1 and 1.

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Answer:

35.75 (inches)

Step-by-step explanation:

7 3/4 is the width and 10 1/8 is the length.

perimeter = 2L + 2W

= 2 (10 1/8) + 2(7 3/4)

= 20 2/8  +  14 6/4

= 20.25 + (14 + 1 + 2/4)

= 20.25 + (15 + 1/2)

= 20.25 + 15 + 0.5

= 35.75 (inches)

To verify that { ¯ u1, ¯ u2 } forms an orthogonal set, we need to show that their dot product is zero. Let ¯ u1 =  and ¯ u2 = . Then, their dot product is:
¯ u1 · ¯ u2 = a1a2 + b1b2 + c1c2

If this dot product is zero, then the vectors are orthogonal. So, we need to solve the equation:
a1a2 + b1b2 + c1c2 = 0
If this equation is true for our given vectors ¯ u1 and ¯ u2, then they form an orthogonal set.
To find the orthogonal projection of ¯ v onto w = span{ ¯ u1, ¯ u2}, we can use the formula:
projw ¯ v = ((¯ v · ¯ u1) / (¯ u1 · ¯ u1)) ¯ u1 + ((¯ v · ¯ u2) / (¯ u2 · ¯ u2)) ¯ u2
where · represents the dot product.
So, we first need to find the dot products of ¯ v with ¯ u1 and ¯ u2, as well as the dot products of ¯ u1 and ¯ u2 with themselves:
¯ v · ¯ u1 = av a1 + bv b1 + cv c1
¯ v · ¯ u2 = av a2 + bv b2 + cv c2
¯ u1 · ¯ u1 = a1 a1 + b1 b1 + c1 c1
¯ u2 · ¯ u2 = a2 a2 + b2 b2 + c2 c2
Then, we plug these values into the formula to get the projection:
projw ¯ v = ((av a1 + bv b1 + cv c1) / (a1 a1 + b1 b1 + c1 c1)) ¯ u1 + ((av a2 + bv b2 + cv c2) / (a2 a2 + b2 b2 + c2 c2)) ¯ u2
This is the orthogonal projection of ¯ v onto w.

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The area of the region bounded by f(x) = 11x − 19 and g(x) = 3x − 8 on the interval [2,5] is 24.

To determine the area of the region bounded by f(x) = 11x − 19 and g(x) = 3x − 8 on the interval [2,5], we need to find the points where the two functions intersect. Setting 11x − 19 = 3x − 8, we get x = 11/4. Since 11/4 is between 2 and 5, this means the two functions intersect within the interval [2,5].

To find the area between the two functions, we need to integrate the difference between f(x) and g(x) over the interval [2,5]. Thus, the area is given by:

∫2^5 [11x − 19 − (3x − 8)] dx

Simplifying this expression, we get:

∫2^5 8x − 11 dx

Integrating, we get:

[4x^2 − 11x]2^5 = 24

Therefore, the area of the region bounded by f(x) = 11x − 19 and g(x) = 3x − 8 on the interval [2,5] is 24.

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the indentation diagonal length is approximately 0.0686 units.

What is Intention Diagonal Length?

The indentation diagonal d is determined by the mean value of the two diagonals d 1 and d 2 at right angles to each other: To avoid the risk of bulging of the material on the opposite side of the sample, the thickness should not fall below a certain minimum value. value. The minimum thickness depends on the expected hardness of the material and the test load.

To calculate the indentation diagonal length using the Vickers hardness value, you need to know the applied load and the hardness number. The Vickers hardness test measures the resistance of a material to indentation using a diamond indenter.

In this case, you have the following information:

Load: 0.700 kg

Vickers HV: 650

The Vickers hardness number (HV) is defined as the applied load divided by the surface area of the indentation.

The formula to calculate the indentation diagonal length (d) is:

d = 1.854 * sqrt(L / HV)

Where:

d = indentation diagonal length

L = applied load in kg

HV = Vickers hardness number

Plugging in the values:

d = 1.854 * sqrt(0.700 / 650)

Calculating the square root and performing the division:

d ≈ 1.854 * 0.0370262

d ≈ 0.0686

Therefore, the indentation diagonal length is approximately 0.0686 units. Please note that the specific unit (e.g., millimeters) was not provided in the question, so the answer is given in relative units.

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The work required to pump all the water to a level 1 foot above the top of the tank is 261.8 ft-lb.

The tank formed by rotating y = 4x2, 0 ≤ x ≤ 1 about the y-axis is full of water.

The density of the water is given by rho = 62.5 lb/ft3.

To calculate the work required to pump all the water to a level 1 foot above the top of the tank, we will first need to find the volume of the tank and then use it to calculate the weight of the water.

V = ∫2π [∫04x2dy]dx

The inner integral will be integrated with respect to y from 0 to 4x2, whereas the outer integral will be integrated with respect to x from 0 to 1.∫04x2dy = y|04x2= 4x2Therefore, the volume of the tank is

V = ∫2π [∫04x2dy]dx= ∫21[∫04x264π]dx= 1/3π (4) (1) 3= 4/3 π cubic feet

Now, we will use the density of water to find the weight of the water in the tank.

ρ = 62.5 lb/ft3

Weight of water = volume of water × density of water

= (4/3)π × 62.5

= 261.8 lb

The work required to pump all the water to a level 1 foot above the top of the tank will be the product of the weight of the water and the distance it is being raised.

W = F × d

= 261.8 lb × 1 ft

= 261.8 ft-lb

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