Can you guys help me?​

Answer:

when y=3.2, the value of x is 0.4.

Step-by-step explanation:

If y is directly proportional to x, it means that y = kx, where k is the constant of proportionality. To find the value of k, we can use the given information that when x=20, y=160:

y = kx

160 = k(20)

k = 8

Now that we have the value of k, we can use it to find the value of x when y=3.2:

y = kx

3.2 = 8x

x = 0.4

Therefore, when y=3.2, the value of x is 0.4.

From the discriminant of the give quadratic equation, the temperature of the machine will part after 50 minutes of operation.

The given equation that models the temperature of the machine is;

T = -0.005x² + 0.45x + 125

Let check if there's a value that exists for T = 135

Putting T = 135 in the given equation,

135 = -0.005x² + 0.45x + 125

We can simplify this to;

0.005x² - 0.45x + 10 = 0

From the general form of quadratic equation which is ax² + bx + c = 0, where a = 0.005, b = -0.45, and c = 10.

The discriminant of this quadratic equation is given by:

D = b² - 4ac

= (-0.45)² - 4(0.005)(10)

= 0.2025 - 0.2

= 0.0025

The discriminant of the equation is positive which indicates we have two roots. Therefore, the temperature of the machine part will cross 135°F at some point during the operation.

We can also find the roots of the quadratic equation using the formula:

[tex]x = (-b \± \sqrt(D)) / 2a[/tex]

Substituting the values of a, b, and D, we get:

[tex]x = (0.45 \± \sqrt(0.0025)) / 2(0.005)\\= (0.45 \± 0.05) / 0.01[/tex]

Taking the positive value, we get:

x = 50

Therefore, the temperature of the machine part will cross 135°F after 50 minutes of operation.

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The directional derivative of f(x,y) at point P(1,5) in the direction of PQ is -2√2.

Find the directional derivative of the function f(x,y) = 3x² - y² + 4 at point P(1,5) in the direction of PQ, where P(1,5) as well as Q(4,2), we need to first calculate the gradient of f(x,y) at point P.

The gradient of f(x,y) at P is:

∇f(x,y) = [∂f/∂x, ∂f/∂y] = [6x, -2y]

Evaluating this at point P(1,5), we get:

∇f(1,5) = [6(1), -2(5)] = [6, -10]

Now, we need to find the unit vector in the direction of PQ. This can be calculated as follows:

u = PQ/|PQ|

where PQ = Q - P = [4 - 1, 2 - 5] = [3, -3] and |PQ| = √(3² + (-3)²) = √18 = 3√2

So, u = PQ/|PQ| = [3/3√2, -3/3√2] = [1/√2, -1/√2]

The directional derivative of f(x,y) at P in the direction of PQ is then given by:

D_u f(P) = ∇f(P) · u

where · represents the dot product.

Substituting the values we obtained earlier, wehave:

D_u f(P) = [6, -10] · [1/√2, -1/√2]

D_u f(P) = (6/√2) + (-10/√2)

D_u f(P) = -2√2

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Answer: the last one

Step-by-step explanation:

the car went slow at the end

The correct answer is All. (i.e.as a group what do we do?, how would you discuss this issue?, what new rules might this group create to allow for emotive words yet avoid the consequences of their use?)

Group members should ask themselves how their use of emotive words may affect the group dynamic, and should consider how can they use these words to make other group members feel and if it is appropriate to express their opinion in this way and also think about the impact this might have on the group's ability to achieve its goals and objectives.

They should consider what new rules may be created to allow for emotive words yet avoid the consequences of their use.  And also they should ask themselves if there are other ways to express their opinion which may be much effective and appropriate. All of these questions should be asked in order to ensure that the group remains respectful and productive.

Full Question:

when emotive words are used in a group, which of the following questions should group members ask themselves?

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Answer: B (3,333 yards, 1 foot)

Step-by-step explanation: 10,000 feet / 3yards= 3,333.33 yards

3 feet in every yard so divide 10,000 by 3 and get 3,333.33 yards. since there are 3 feet in every yard the .33 is 1 foot.

Sacramento, California's electricity demand on a scorching summer day is depicted in a function graph. The domain is 24 hours of a day.

The site is available around-the-clock.

One thousand two hundred megawatts are consumed at eight in the morning.

The hours between 4:00 and 6:00 pm saw the highest electricity use, while 4:00 am saw the lowest use.

It would be 1,900 megawatts for f (12).

From 4 am to 5 pm, usage rises, and from 5 pm to 4 am, it falls.

Because each point on the graph reflects a different megawatt usage, the graph is a function. As this graph of electricity usage illustrates, the domain would be available throughout the entire day.

At 8 a.m., these megawatts are used:

= 1, 300 - ( 200 / 2 )

equal to 1,200 megawatts

As people get ready for work and leave for work, we can observe an increase in power demand from 4 am to 5 pm, but a reduction from 5 pm to 4 am.

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The probability of -20 < x < 15, where x be a normal random variable with a mean of 5 and a standard deviation of 10 is approximately 0.8351.

To solve this problem, we need to find the area under the normal distribution curve between -20 and 15, with a mean of 5 and a standard deviation of 10.

We can standardize the normal distribution by subtracting the mean and dividing by the standard deviation, which gives us the standard normal distribution with a mean of 0 and a standard deviation of 1.

So, we can first calculate the z-scores for -20 and 15:

z1 = (-20 - 5) / 10 = -2.5

z2 = (15 - 5) / 10 = 1

Next, we use a standard normal distribution table or calculator to find the probabilities associated with these z-scores:

P(z < -2.5) = 0.0062

P(z < 1) = 0.8413

To find the probability of -20 < x < 15, we subtract the probability associated with the lower z-score from the probability associated with the higher z-score:

P(-20 < x < 15) = P(-2.5 < z < 1) = P(z < 1) - P(z < -2.5)

P(-20 < x < 15) = 0.8413 - 0.0062 = 0.8351

Therefore, the probability of -20 < x < 15 is approximately 0.8351.

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Answer:341.97 N

Step-by-step explanation:Answer and Explanation: The gravitational force on the 35 kg mass at the surface of the Earth is 341.97 N while at the surface of the Moon the 35 kg mass feels only 57.56 N. The gravitational force on the surface of the Earth is 5.94 times greater than that of the surface of the moon.

The breadth, B which the soap carvings should be equal for the top of the bookcase to have the correct area is 5 inches.

In Mathematics, the area of a rectangle can be calculated by using the following mathematical equation:

A = LB

Where:

Substituting the given parameters into the area of rectangle formula, we have the following;

Area of soap carvings = length × width

300 = 60B

Width, B = 300/60

Width, B = 5 inches.

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With regard to p-charts, the general recommendation for the number of samples to be taken when estimating p is  to take at least 20-25 samples.

The number of samples needed when estimating p using p-charts depends on the desired level of accuracy and confidence.

A general recommendation is to take at least 20-25 samples to obtain a reasonably accurate estimate of p. This recommendation is based on the central limit theorem, which states that the distribution of sample proportions approaches a normal distribution as the sample size increases.

With a sample size of 20-25, the estimate of p is likely to be within a reasonable margin of error and have a sufficient level of confidence.

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Random variation in a process indicates natural variation ; whereas non-random variation indicates process variation

Random variation in a process refers to the natural variation or randomness that occurs in a process due to various factors that are not controlled or predictable. For example, in a manufacturing process, random variation can be caused by factors such as differences in raw materials, operator error, or environmental conditions that are not controlled.

On the other hand, non-random variation in a process refers to the variation that is not due to chance and is likely caused by specific factors that are affecting the process. Non-random variation is also known as special cause variation. Special cause variation can be caused by factors such as a change in machine settings, a change in process parameters, or a change in the process inputs.

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The particular solution of Differential equation y" – 2y' + 2y = et sin x is yp = (1/2et - 1/2et cos(x))sin(x).

We assume the particular solution is of the form of given differential equation is

yp = (Aet + Bcos(t))sin(x) + (Cet + Dsin(t))cos(x)

where A, B, C, and D are constants to be determined.

Taking the first and second derivative of yp with respect to t:

yp' = Aet sin(x) - Bsin(t)sin(x) + Cet cos(x) + Dcos(t)cos(x)

yp'' = Aet sin(x) - Bcos(t)sin(x) - Cet sin(x) + Dsin(x)cos(t)

Substituting these into the differential equation and simplifying, we get:

(et sin x) = (A - C)et sin(x) + (B - D)cos(x)sin(t)

Since et sin x is not a solution to the homogeneous equation, the coefficients of et sin x and cos(x)sin(t) on both sides of the equation must be equal. Therefore:

A - C = 1 and B - D = 0

Solving for A, B, C, and D, we get:

A = 1/2, B = 0, C = -1/2, D = 0

So the particular solution is:

yp = (1/2et - 1/2et cos(x))sin(x)

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Answer:

45%

Step-by-step explanation:

86 people play an instrument out of 192 students.

86/192 = .4479

.4479 x 100% = 44.79% = 45%

Answer: 45 percent

Step-by-step explanation:

The two requirements for a discrete probability distribution are that the probabilities assigned to each possible outcome must be between 0 and 1 inclusive, and the sum of probabilities of all possible outcomes must be equal to 1.

There are two main requirements for a discrete probability distribution,

The probabilities assigned to each possible outcome must be between 0 and 1 inclusive. That is, the probability of each outcome must be a non-negative number, and the sum of probabilities of all possible outcomes must be equal to 1.

Each possible outcome must be mutually exclusive. That is, only one of the possible outcomes can occur on any given trial of the random experiment.

These two requirements ensure that the probabilities assigned to each outcome are valid and that the total probability space is complete, allowing us to make valid inferences and predictions about the outcomes of random events.

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I have solved the question in general, as the given question is incomplete.

The complete question is:

What are the two requirements for a discrete probability distribution?

1. The total yards of each fabric that Karina will buy to make a quilt is as follows:

a) Green Fabric = 12 square yards

b) Burgundy Fabric = 19 square yards

2. The total yards of fabric she will buy is 31 square yards.

The total yards of fabric can be determined by unit conversion using division operation.

Given that 36 inches = 1 yard, the square inches of fabric are converted to square yards by dividing the total by 36.

The total number of green fabric Karina requires = 420 square inches

= 12 square yards (420/36)

The total number of burgundy fabric Karina requires = 688 square inches

= 19 square yards (688/36)

The total number of fabric (green and burgundy) = 1,108 square inches (420 + 688)

36 inches = 1 yard

1,108 inches = 30.78 square yards (1,108/36)

= 31 square yards or (12 + 19)

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The correct matches are: 4 in. → 10.2 cm   ,   7 kg → 15.4 lb

6 gal → 22.7 L   and  65 ft → 19.8 m.

Conversions refer to the process of changing a measurement from one unit to another unit that measures the same quantity.

For example, converting distance from miles to kilometers, or converting weight from pounds to kilograms.

Here are the conversions:

1 inch = 2.54 cm (approx.)

1 kg = 2.205 lb (approx.)

1 gal = 3.785 L (approx.)

1 ft = 0.3048 m (approx.)

Using these conversions, we can find the equivalent measures:

4 in. → 4 × 2.54 = 10.16 ≈ 10.2 cm

7 kg → 7 × 2.205 = 15.435 ≈ 15.4 lb

6 gal → 6 × 3.785 = 22.71 ≈ 22.7 L

65 ft → 65 × 0.3048 = 19.812 ≈ 19.8 m

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In a budget, an expense for a flu shot would typically fall under the category of "Healthcare" or "Medical Expenses".

What is Flu Shot?

A flu shot is a vaccine that helps protect against the influenza virus, which can cause the flu. The vaccine works by stimulating the body's immune system to produce antibodies that can recognize and fight off the flu virus. The flu shot is usually given as an injection in the upper arm, and it typically contains small amounts of inactivated flu viruses, which cannot cause the flu.

The Centers for Disease Control and Prevention (CDC) recommends that everyone over the age of six months get a flu shot every year, as the flu can be a serious and sometimes deadly illness. The flu virus can mutate and change each year, so getting a flu shot annually helps protect against the most prevalent strains of the virus that are circulating. While the flu shot does not guarantee that a person won't get the flu, it can greatly reduce the severity and duration of the illness if contracted.

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The center coordinates and radius of the given circle (x - 8)^2 + (y + 4)^2 = 12 is given by ( 8 ,-4 ) and 2√3 respectively.

Equation of the circle is equal to ,

(x - 8)^2 + (y + 4)^2 = 12.

Standard form of the equation of the circle is equals to,

( x - a )^2 + ( y - b )^2 = r^2  ___(1)

Where ( a, b ) are the coordinates of the center of the circle.

And r is the radius of the circle.

Convert the equation of the circle (x - 8)^2 + (y + 4)^2 = 12 into standard form we have,

(x - 8)^2 + (y + 4)^2 = ( 2√3 )^2  ___(2)

Compare equation (1) and (2) to get coordinates of the center and radius of the circle.

Here value of a = 8

value of b = -4

Radius of the circle 'r' = 2√3

Therefore, the center of the coordinates and radius of the circle is equal to ( 8 ,-4 ) and 2√3 respectively.

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The above question is incomplete, the complete question is:

Find the coordinates of the center and the measure of the radius for a circle whose equation is(x - 8)^2 + (y + 4)^2 = 12.

Answer:

7^1/3 * y^1/3

Step-by-step explanation:

(7y) ^ 1/3

We know that (ab) ^c = a^c * b^c

7^1/3 * y^1/3

We can estimate that the middle 95% of all miniature Tootsie rolls will fall within the range of 3.04 grams to 3.56 grams for standard deviation of 0.13 gram.

A normal distribution is a symmetric, bell-shaped continuous probability distribution that is defined by its mean and standard deviation. The majority of the data in a normal distribution is located close to the mean, and the number of data points decreases as you deviate from the mean in either direction. Because many real-world events, like human height or test scores, have a tendency to follow a normal distribution, the normal distribution is frequently utilised in statistics. A helpful technique for determining the range of values within a normal distribution based on the mean and standard deviation is the empirical rule, commonly known as the 68-95-99.7 rule.

Given that, the mean of 3.30 grams and standard deviation of 0.13 gram.

Using the empirical formula the range that falls in 95% is associated to two standard deviations.

Mean + 2 standard deviations = 3.30 + 2(0.13) = 3.56 grams

Mean - 2 standard deviations = 3.30 - 2(0.13) = 3.04 grams

Hence, we can estimate that the middle 95% of all miniature Tootsie rolls will fall within the range of 3.04 grams to 3.56 grams.

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(1) 4y-7z is a binomial.

(2) 8-xy² is a binomial.

(3) ab-a-b can be written as ab - (a + b) which is a binomial.

(4) z²-3z+8 is a trinomial.

In algebra, monomials, binomials, and trinomials are expressions that contain one, two, and three terms, respectively.

A monomial is an algebraic expression with only one term. A monomial can be a number, a variable, or a product of numbers and variables.

A binomial is an algebraic expression with two terms that are connected by a plus or minus sign. For example, 2x + 3y and 4a - 5b are both binomials.

A trinomial is an algebraic expression with three terms that are connected by plus or minus signs.

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Classify into monomials, binomials and trinomials.

(1) 4y-7z

(1) 8-xy²

(v) ab-a-b

(ix) z2-3z+8

If a data set has an even number of observations, the median is the middle value of the two middle values when all values are placed in ascending order. Thus, option d is correct.

The median is the central value in a set of groups of data. The data should be organized and ordered from smallest value to biggest value. To find the middle value, we should divide the number of observations by two.

To determine the median, we must determine the Mean. Then, we need to calculate out how many observations there are in the data set. If there are an odd number of observations, the median cannot be calculated as a regular calculation.

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The equation which correctly relates the measure of diameter and radius of a circle is (c) r = d/2.

The Diameter (d) of a circle is defined as the distance across the circle through its center. The radius (r) of a circle is defined as the distance from the center of the circle to any point on the circle.

We know that the radius of the circle is half of diameter, because it extends from the center to the edge of the circle, while the diameter extends all the way across the circle.

So, we can express the relationship between d and r as:

⇒ d = 2r

To solve for r, we can divide both sides by 2:

We get,

⇒ r = d/2

Therefore, The correct equation is Option (c) r = d/2.

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The given question is incomplete, the complete question is

Which of the following correctly relates the measures of the diameter (d) and radius (r) of a circle?

(a) d = r/2

(b) r = 2d

(c) r = d/2

(d) d = 2/r

When the radius of spherical balloon r = 70 cm, the rate of change of the radius is approximately 0.002 cm/min and when the radius is 95 cm then the rate of change of the radius is approximately 0.001 cm/min.

The volume of a sphere is given by V = (4/3)πr^3, where r is the radius. Differentiating both sides with respect to time t, we get:

dV/dt = 4πr^2(dr/dt)

where dV/dt is the rate of change of the volume and dr/dt is the rate of change of the radius.

We are given that dV/dt = 900 cm^3/min.

When r = 70 cm, we can solve for dr/dt as follows:

900 = 4π(70)^2(dr/dt)

dr/dt = 900 / (4π(70)^2) ≈ 0.002 cm/min

Therefore, when r = 70 cm, the rate of change of the radius is approximately 0.002 cm/min.

Similarly, when r = 95 cm, we can solve for dr/dt as follows:

900 = 4π(95)^2(dr/dt)

dr/dt = 900 / (4π(95)^2) ≈ 0.001 cm/min

Therefore, when r = 95 cm, the rate of change of the radius is approximately 0.001 cm/min.

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Answer:

f(x) = (x^2 - 25) / (x - 5)

Step-by-step explanation:

Note that this function is undefined at x=5, which satisfies condition (a). Also, the function is defined for all other real numbers, which satisfies the domain and range requirement of (a).

For condition (b), note that the function is defined for all positive numbers greater than 1, including 1, since the denominator (x-5) will be positive for these values of x.

For condition (c), note that the function is undefined at x=1, since the denominator (x-5) will be negative for x slightly less than 1. Therefore, the function is defined for all positive numbers greater than 1, but not including 1.

2√2

The square root of 8 in radical form is represented as √8 which is also equal to 2√2 and as a fraction, it is equal to 2.828 approximately.

The expression that is not equivalent to the model shown is given as follows:

-4(3 + 2). -> Option C.

Equivalent expressions are mathematical expressions that have the same value, even though they may look different. In other words, two expressions are equivalent if they produce the same output for any input value.

The expression for this problem is given by three times the subtraction of four, plus three times the addition of 2, hence:

3(-4) + 3(2) = -12 + 6 = 3(-4 + 2) = 3(-2) = -6.

Hence the expression that is not equivalent is the expression given in option C, for which the result is given as follows:

-4(3 + 2) = -4 x 5 = -20.

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We can use trigonometry to solve this problem. Let's call the horizontal distance from the boat to the lighthouse "x". We can use the tangent function to find x:

tangent(8 degrees) = opposite / adjacent

tangent(8 degrees) = 148 / x

To solve for x, we can rearrange the equation:

x = 148 / tangent(8 degrees)

x ≈ 1041.87 feet

So the ship's horizontal distance from the lighthouse (and the shore) is approximately 1041.87 feet or 1041.87 rounded to the nearest hundredth of a foot if necessary.

Answer:

Your answer is 1053.07

Hope I helped!

Step-by-step explanation: