The probability that X = 3 is 1/12.
To compute the probability that X = 3, we need to consider all possible ways of drawing three chips and count the number of ways in which we obtain three blue chips.
The total number of ways of drawing three chips from the urn without replacement is:
10C3 = (10!)/(3!7!) = 120
This is because we need to choose 3 chips out of the 10 in the urn, and the order in which we draw them does not matter.
Now, we need to count the number of ways in which we can obtain three blue chips. Since there are 5 blue chips in the urn, the number of ways of choosing 3 blue chips out of 5 is:
5C3 = (5!)/(3!2!) = 10
Therefore, the probability of obtaining three blue chips is:
P(X = 3) = 10/120 = 1/12
Hence, the probability that X = 3 is 1/12.
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The probability that X which denotes the total number of blue chips obtained when 3 consecutive chips are drawn from the urn without replacement is 1/12.
To calculate the probability that X = 3, the first step is to consider all the possible ways in which three chips can be drawn and count the number of ways in which we obtain three blue chips.
The total number of ways of drawing three chips from the urn without replacement is:
¹⁰C₃ = (10!)/(3!)(7!) = 120
This is because we need to choose 3 chips out of the 10 in the urn, and the order in which we draw them does not matter. Now, we need to count the number of ways in which we can obtain three blue chips. Since there are 5 blue chips in the urn, the number of ways of choosing 3 blue chips out of 5 is:
⁵C₃ = (5!)/(3!)(2!) = 10
Therefore, the probability of obtaining three blue chips is:
P(X = 3) = 10/120 = 1/12
Hence, the probability that X = 3 is 1/12.
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Question 23 (2 points)
A standard deck of cards contains 4 suits of the same 13 cards. The contents of a
standard deck are shown below:
Standard deck of 52 cards
4 suits (CLUBS, SPADES, HEARTS, DIAMONDS)
13 CLUBS
13 SPADES
13 HEARTS
13 DIAMONDS
If two cards are drawn at random from the deck of cards, what is the probability both
are kings?
4/52
3/51
12/2652
16/2704
Answer:
12/2652
Step-by-step explanation:
First, the probability of drawing a king for the first time is 4/52. The chance of drawing another is 3/51. Multiplying, we get the 3rd answer choice, 12/2652
the values or variables listed in the function declaration are called _____ paramters to the function.
The values or variables listed in the function declaration are called formal parameters to the function.
They are used to store the data that is passed into the function when it is called. The formal parameters are local variables, meaning that the values stored in them are only available within the function.
The arguments are the values passed to the function when it is called. These values are then assigned to the formal parameters and are used within the function to perform the desired task.
Formal arguments are produced at function entry and removed at function exit, behaving similarly to other local variables inside the function.
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I will mark you brainiest!
Vertical angles are supplementary.
True
False
Answer:
True
Step-by-step explanation:
Vertical angles are right angle that is 90°
A supplementary angle is an angle that forms up by 2 angles with the sum of 180°.
It is true because 2 vertical angles form a supplementary angle.
Answer:
True. Vertical angles are angles that are opposite each other when two lines intersect, so they have the same measure. Sum of measures of two angles is 180 degrees, which makes them supplementary angles.The variable s represents the number of students in one class in your school. What does 1/2s represent?
Answer: it represents half of the students in 1 class
Step-by-step explanation:
1/2 divided by s
Answer:
1/2s would then represent one half (or 50%) of the students in the singular class stated.
The function rule for this graph is Y equals___ X + ___
The answer is below in case someone needs it.
The function rule for this graph is y = -1/2(x) + 2.
How to determine an equation of this line?In Mathematics, the point-slope form of a straight line can be calculated by using the following mathematical expression:
y - y₁ = m(x - x₁) or [tex]y - y_1 = \frac{(y_2- y_1)}{(x_2 - x_1)}(x - x_1)[/tex]
Where:
m represent the slope.x and y represent the points.At data point (0, 2), a linear equation in slope-intercept form for this line can be calculated by using the point-slope form as follows:
[tex]y - y_1 = \frac{(y_2- y_1)}{(x_2 - x_1)}(x - x_1)\\\\y - 2 = \frac{(0- 2)}{(4 -0)}(x -0)[/tex]
y - 2 = -1/2(x)
y = -1/2(x) + 2.
In this context, we can reasonably infer and logically deduce that an equation of the line that represents this graph in slope-intercept form is y = -1/2(x) + 2.
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Solve using the correct order of
operations.
P
E
MD
AS
15-(4-3) 2= [?]
Enter
Help
Using the correct order of operations, the value is 13
What is PEDMAS?PEDMAS is simply described as a mathematical acronym that represents the different arithmetic operations in order from least to greatest of application.
The alphabets represents;
P represents parentheses.E represents exponents.D represents division.M represents multiplication.A represents addition.S represents subtraction.From the information given, we have;
15-(4-3)2
solve the parentheses first
15 - (1)2
Multiply the values
15 - 2
Subtract the values
13
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The complete question:
Solve using the correct order of
operations of PEMDAS
15 - (4-3)2
Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find the probability of obtaining a reading between 0.59°C and 0.88°C.
The probability of obtaining a reading between 0.59°C and 0.88°C is 0.7224 and 0.8106.
What is mean?The sum of all possible values, weighted by the chance of each value, is equal to the mean of a discrete probability distribution of the random variable X. Each possible number of X must be multiplied by its probability P(x) before being added as a whole to determine the mean. In statistics, the mean is one measure of central trend in addition to the mode and median. The mean is simply the average of the numbers in the specified collection. It suggests that values in a specific data gathering are evenly distributed. In order to find the mean, the total values given in a datasheet must be added, and the result must be divided by the total number of values.
In this question, using the formula,
z-score = (x – μ) / σ
where:
x: individual data value
μ: population mean
σ: population standard deviation
for x=0.59
μ= 0
σ= 1
z-score= 0.59
Probability=0.7224
for x=0.88
z-score= 0.88
Probability=0.8106
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For a standard normal distribution, suppose the following is true:
P(z < c) = 0.0166
Find c.
Answer:
From the given information, we know that the area to the left of c under the standard normal distribution curve is 0.0166.
Using a standard normal distribution table or calculator, we can find the corresponding z-score for this area.
A z-score represents the number of standard deviations away from the mean. For a standard normal distribution, the mean is 0 and the standard deviation is 1.
Looking up the area of 0.0166 in the z-table, we find that the corresponding z-score is approximately -2.06.
Therefore, we have:
P(z < c) = 0.0166
P(z < -2.06) = 0.0166
So, c = -2.06.
Answer:
Using a standard normal distribution table, we can find the z-score corresponding to a probability of 0.0166:
z = -2.07
Therefore, c = -2.07.
Step-by-step explanation:
How many numbers are 10 units from 0 on the number line?
Answer: 10 is two units from 0 on the number line, so there are six numbers that are 10 units from 0.
Step-by-step explanation:
let me have brainliest real quick
suppose that {u,v} is a basis of a subspace u of a vector space v. show that 3u, 4u v is a basis of u
A = {u + 2v, -3} is the basis for subspace U given that the set A is now linearly independent and that U = span(A).
Since U = span(S), and the set S is linearly independent, let S = {u, v} be the basis of the subspace U.
Now determine whether or not the set A = {u + 2v, -3v} is linearly independent.
A set of vectors must all have linear combinations that add up to zero in order for them to be considered linearly independent. Let a and b represent any scalars so that,
a(u + 2v) + b(-3v) = 0
Simplify the obtained equation.
au + 2av - 3bv = 0
au + v(2a - 3b) = 0
Make 2a - 3b = A.
Rewrite the equation that was found using this.
Now because u and v are linearly independent, a and A must be zero, and as a result, the constant b is also zero.
Set A is hence linearly independent.
Also, au + Av ∈ U, so, U = span(A).
Considering that the set A is now linearly independent and that U = span(A), the basis for subspace U is A = {u + 2v, -3}.
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The complete question is:
If {u, v} is a basis for the subspace U, show that {u + 2v, −3v} is also a basis for U.
name three angles that sum up to 180 degrees
The three angles are= angleMCD + angleCMD + angleGMF= 180.
What are angles?Two lines intersect at a location, creating an angle.
An "angle" is the term used to describe the width of the "opening" between these two rays. The character is used to represent it.
Angles are frequently expressed in degrees and radians, a unit of circularity or rotation.
In geometry, an angle is created by joining two rays at their ends. These rays are referred to as the angle's sides or arms.
An angle has two primary components: the arms and the vertex. T
he two rays' shared vertex serves as their common terminal.
According to our question-
angleM= 127
angleC=27
angleG=26
127+27+26
180
Hence, The three angles are= angleMCD + angleCMD + angleGMF= 180.
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Answer: <MCD, <CMD, and <GMF
Step-by-step explanation:
find surface area of cilinder with the radius of 9 and height of 14. make sure to put the correct exponents with answer.
The cylindrical has a surface area of 414 square units due to its 9-unit radius and 14-unit height.
what is cylinder ?A cylinder is a three-dimensional geometric form made up of two circular bases that are parallel to one another and are joined by a curved lateral surface. It can be pictured as a solid item with a constant circular cross-section along its entire length. The measurements of a cylinder, such as the radius and height of the circular bases, affect its characteristics. The surface area, volume, and horizontal surface area of a cylinder are some of its typical characteristics. Mathematical formulas can be used to determine these properties.
given
The following algorithm determines a cylinder's surface area:
[tex]A = 2\pi r^2 + 2\pi rh[/tex]
where r is the cylinder's base's radius, h is the cylinder's height, and (pi) is a mathematical constant roughly equivalent to 3.14.
Inputting the numbers provided yields:
[tex]A = 2\pi (9)^2 + 2\pi (9)(14)\\[/tex]
A = 2π(81) + 2π(126)
A = 162π + 252π
A = 414π
The cylindrical has a surface area of 414 square units due to its 9-unit radius and 14-unit height.
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what is x?
what is m?
what is b?
x=?
m=?
b=?
There is a vertical asymptote at x = 2 and the slope and intercept of the oblique asymptote are 2 and - 1, respectively.
How to determine the vertical asymptote and the oblique asymptote
In this problem we find the definition of a rational function:
f(x) = (2 · x² - 5 · x + 3) / (x - 2)
The vertical asympote correspond to the vertical line at the x-value where the function is undefined. And the oblique asymptote is defined by a equation of the form:
y = m · x + b
Where:
m - Slopeb - InterceptAnd the slope and the intercept of the asymptote can be found by means of the following equation:
Slope
[tex]m = \lim_{x \to \pm \infty} \left[\frac{f(x)}{x}\right][/tex]
Intercept
[tex]b = \lim_{x \to \pm \infty} [f(x) - m \cdot x][/tex]
First, factor and simplify the rational equation to determine whether any zero is evitable:
f(x) = (2 · x² - 5 · x + 3) / (x - 2)
f(x) = (2 · x - 3) · (x - 1) / (x - 2)
The discontinuity at x = 2 is not evitable. Then, the equation for the vertical asymptote is x = 2.
Second, determine the slope and the intercept of the oblique asymptote:
[tex]m = \lim_{x \to \pm \infty} \left[\frac{2\cdot x^{2}-5\cdot x + 3}{x^{2} - 2\cdot x} \right][/tex]
m = 2
[tex]b = \lim_{x \to \pm \infty} \left[\frac{2\cdot x^{2}-5\cdot x + 3}{x - 2} - 2 \cdot x\right][/tex]
[tex]b = \lim_{x \to \pm \infty} \left[\frac{2\cdot x^{2}-5\cdot x + 3-2 \cdot x^{2}+4\cdot x}{x-2}\right][/tex]
[tex]b = \lim_{x \to \pm \infty} \left[\frac{3 - x}{x-2} \right][/tex]
b = - 1
The slope and the intercept of the oblique asymptote are 2 and - 1, respectively.
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What is the balance after two years on a CD with an initial investment of $3,000.00 and a 2.5% interest rate? A. $3050.00 C. $3151.88 B. $3150.00 D. $3075.00
Step-by-step explanation:
The balance will be the initial deposit ( p = 3000) plus the interest earned for two years p r t where r = decimal interest per year t = 2 years
Balance = $ 3000 + 3000 * .025 * 2 = $ 3150.00
HELP Whats the Answer to this Stand Deviation Question?
Answer: he would be 2 standard deviations above the
Step-by-step explanation:
Values of the Born exponents for Rb+ and l-are 10 and 12, respectively. The Born exponent for Rbl is therefore: O A. 2 O B.22 C. 1/11 OD. 11
The Born exponent or interatomic potential energy for Rbl is 11 ( approximately). The correct option is D).
The Born exponent for RbI can be calculated using the relationship between the Born exponent and the interionic distance. The Born exponent is defined as the ratio of the repulsive to attractive contributions to the interatomic potential energy, and it depends on the charges and sizes of the ions.
For Rb+ and I-, the Born exponents are 10 and 12, respectively. This means that the repulsive interaction between Rb+ and I- is weaker than the attractive interaction, as the repulsion is proportional to Rb+^10 and the attraction is proportional to I^-12. Therefore, the attractive interaction dominates.
For RbI, we can use the relationship between the Born exponent and the interionic distance to calculate the Born exponent. This relationship is given by:
B = (1/d) * ln[(l1 + l2)/|l1 - l2|]
where B is the Born exponent, d is the interionic distance, and l1 and l2 are the ionic radii of the cation and anion, respectively.
Assuming the ionic radii of Rb+ and I- are additive, we have:
l1 + l2 = l(RbI) = l(Rb+) + l(I-) = 1.52 + 1.81 = 3.33 Å
|l1 - l2| = |l(Rb+) - l(I-)| = |1.52 - 1.81| = 0.29 Å
Substituting these values into the equation for B, we get:
B = (1/d) * ln[(l1 + l2)/|l1 - l2|] = (1/d) * ln[3.33/0.29] ≈ 11.02
Therefore, the Born exponent for RbI is approximately 11.02.
The correct answer is D).
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At a certain instant, the base of a triangle is 5 inches and is increasing at the rate of 1 inch per minute. At the same instant, the height is 10 inches and is decreasing at the rate of 2.5 inches per minute. Is the area of the triangle increasing or decreasing? Justify your answer.
Using differentiation, the area of the triangle is decreasing at the given time.
Is the area of the triangle increasing or decreasing?The formula for the area of a triangle is:
A = (1/2)bh
where b is the base and h is the height.
Differentiating both sides of the equation with respect to time t, we get:
[tex]\frac{dA}{dt} = (1/2)[(\frac{db}{dt}) h + b(\frac{dh}{dt}) ][/tex]
Substituting the given values, we get:
[tex]\frac{dA}{dt} = (1/2)[(1)(10) + (5)(-2.5)] = (1/2)(10 - 12.5) = -1.25[/tex]
Since the derivative of the area with respect to time is negative (-1.25), the area of the triangle is decreasing at the given instant.
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Jerry writes down all the odd numbers 1, 3, 5, 7, up to 999. How many numbers does he write down?
There are 500 odd numbers between 1 and 999.
We can solve this problem using the arithmetic sequence formula, which is
an = a1 + (n - 1)d
where
an is the nth term of the sequence
a1 is the first term of the sequence
n is the number of terms in the sequence
d is the common difference between consecutive terms
In this case, a1 = 1, the common difference is 2, and we want to find the value of n such that an = 999. So we have
999 = 1 + (n - 1)2
Simplifying this equation, we get
998 = 2(n - 1)
499 = n - 1
n = 500
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Sharon used 8 roses and 6 tulips to make a bouquet. The tape diagram below shows the relationship between the number of roses and the number of tulips in the bouquet.
Answer:
Step-by-step explanation:
its C
10 POINTS!!!NEED HELP ASAP PLEASE HELP FIND THE AREA AND THE PERIMETER!!
Answer: Area: 460.48 ft^2 Perimeter: 90.12 ft
Step-by-step explanation:
The area is 1/2 * 3.14 * (16 / 2)^2 (area of semicircle)
+ 10 * 12 / 2 (area of triangle)
+ 20 * 15 (area of rectangle)
= 460.48
The perimeter is 1/2 * 16 * 3.14 (perimeter of semicircle)
+ 10 (perimeter of triangle)
+ 20 + 15 + 20 (perimeter of rectangle)
= 90.12
The bar chart below summarizes the final grade distribution for a statistics Course: {{ Y = Count X=ABCDF A = 5 B = 9 C = 11 D=8 F = 7 I }} Which percentage of students earned a B in the statistics course? A) 9% B) 22.5% C) 27.5% D) 40%
The percentage of students earned a B in the statistics course is 22.5%. So, the correct option is B).
To find the percentage of students who earned a B in the course, we need to determine the total number of students who took the course and the number of students who earned a B.
Using the information given in the bar chart, we can determine that there were a total of 40 students who took the statistics course. The number of students who earned a B is given as 9 in the bar chart. Therefore, the percentage of students who earned a B is (9/40) x 100%, which simplifies to 22.5%.
The total number of students who took the statistics course is:
Y = A + B + C + D + F = 5 + 9 + 11 + 8 + 7 = 40
The percentage of students who earned a B is:
(B/Y) x 100% = (9/40) x 100% = 22.5%
Therefore, the correct answer is (B) 22.5%.
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Does 9:45 am and 9:45 pm considered total of 12 hours
Answer:
Yes. If you are asking if the duration between those two times is a total of 12 hours, the answer is yes.
Step-by-step explanation:
9:45am is 12 hours away from 9:45pm. This applies to all times and their am/pm counterparts such as 12am/12pm.
Susan rolled a number cube 40 times and got the following results. Outcome Rolled 1,2,3,4,5,6 Number of Rolls 0,4,3,5,2,6 Answer the following. Round your answers to the nearest thousandths.
(a)From Susan's results, compute the experimental probability of rolling an even number. ___
(b)Assuming that the cube is fair, compute the theoretical probability of rolling an even number.
(c)Assuming that the cube is fair, choose the statement below that is true. With a small number of rolls, it is surprising when the experimental probability is much greater than the theoretical probability. ___
(c)Assuming that the cube is fair, choose the statement below that is true.
Select one of these:
1. With a small number of rolls, it is not surprising when the experimental probability is much greater than the theoretical probability. With a small number of rolls, the experimental probability will always be much greater than the theoretical probability.
2. With a small number of rolls, it is not surprising when the experimental probability is much
greater than the theoretical probability.
3. With a small number of rolls, the experimental probability will always be much greater than
the theoretical probability.
Step-by-step explanation:
(a) Experimental probability of rolling an even number = (number of rolls for 2, 4, and 6) / (total number of rolls) = (4 + 5 + 6) / 40 = 0.375
(b) Theoretical probability of rolling an even number = number of even outcomes / total number of outcomes = 3 / 6 = 0.5
(c) Statement 2 is true: With a small number of rolls, it is not surprising when the experimental probability is much greater than the theoretical probability.
The definition of differentiable also defines an error term E(x,y). Find E(x,y) for the function f(x,y)=8x^2 − 8y at the point (−1,−7).E(x,y)=
The value of error term E(x,y) = 8x^2 - 8x - 56.
The definition of differentiability states that a function f(x,y) is differentiable at a point (a,b) if there exists a linear function L(x,y) such that:
f(x,y) - f(a,b) = L(x,y) + E(x,y)
where E(x,y) is an error term that approaches 0 as (x,y) approaches (a,b).
In the case of the function f(x,y) = 8x^2 - 8y, we want to find E(x,y) at the point (-1,-7).
First, we need to calculate f(-1,-7):
f(-1,-7) = 8(-1)^2 - 8(-7) = 56
Next, we need to find the linear function L(x,y) that approximates f(x,y) near (-1,-7). To do this, we can use the gradient of f(x,y) at (-1,-7):
∇f(-1,-7) = (16,-8)
The linear function L(x,y) is given by:
L(x,y) = f(-1,-7) + ∇f(-1,-7) · (x+1, y+7)
where · denotes the dot product.
Substituting the values, we get:
L(x,y) = 56 + (16,-8) · (x+1, y+7)
= 56 + 16(x+1) - 8(y+7)
= 8x - 8y
Finally, we can calculate the error term E(x,y) as:
E(x,y) = f(x,y) - L(x,y) - f(-1,-7)
= 8x^2 - 8y - (8x - 8y) - 56
= 8x^2 - 8x - 56
Therefore, the error term E(x,y) for the function f(x,y) = 8x^2 - 8y at the point (-1,-7) is E(x,y) = 8x^2 - 8x - 56.
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Find the probability of landing on yellow, the probability of the complement, and the sum of the event and the complement. Type your answers without any spaces.
The probability of landing on yellow is 0.2, probability of component is 0.8, and sum of event and complement is 1.
On assuming that the pie is evenly divided into 5 parts,
So, the probability of landing on yellow is = 1/5 = 0.2,
The complement of landing on yellow is the probability of not landing on yellow, which is the probability of landing on any of the other 4 parts of the pie.
So, the probability of the complement is = 4/5 = 0.8,
The sum of the event (landing on yellow) and the complement (not landing on yellow) is equal to the probability of the entire sample space, which is 1.
⇒ P(Yellow) + P(Not Yellow) = 1
⇒ 0.2 + 0.8 = 1
So, the sum of the event and the complement is 1 or 100%.
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The given question is incomplete, the complete question is
A circular pie is divided in 5 parts , Green , Yellow, Blue Black and Red.
Find the probability of landing on yellow, the probability of complement, and the sum of the event and the complement.
Give an example to show that the Monotone Convergence Theorem (3.11) can fail if the hypothesis that f1, f2, ... are nonnegative functions is dropped. 3.11 Monotone Convergence Theorem Suppose (X, S, u) is a measure space and 0 < fi < f2 <... is an increasing sequence of S-measurable functions. Define f: X → [0,00] by f(x) = lim fx(x). koo Then lim k+00 | fx du = / f du.
The Monotone Convergence Theorem can be demonstrated by considering the decreasing sequence {a_n} = 1/n, which is bounded below by zero and converges to zero.
Consider the sequence of real numbers {a_n} defined as a_n = 1/n. We want to show that the sequence converges to zero.
First, notice that the sequence is decreasing since a_n+1 = 1/(n+1) < 1/n = a_n for all n ≥ 1. Moreover, the sequence is bounded below by zero since a_n > 0 for all n. Thus, the sequence {a_n} is a decreasing bounded sequence and by the Monotone Convergence Theorem, it must converge to some limit L.
Let's now calculate the limit L. Since the sequence is decreasing and bounded below by zero, its limit L must be greater than or equal to zero. Furthermore, for any ε > 0, there exists an N such that 1/n < ε for all n > N, since the sequence converges to zero. Therefore, we have
|a_n - 0| = |1/n - 0| = 1/n < ε for all n > N.
This shows that the limit of the sequence is zero, i.e., lim (n → ∞) 1/n = 0.
Thus, we have demonstrated that the Monotone Convergence Theorem applies to the sequence {a_n}, which is decreasing and converges to zero.
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I have solved the question in general, as the given question is incomplete.
The complete question is:
Give an example to show that the Monotone Convergence Theorem?
Which set of ordered pairs does not represent a function?
1. {(4,0), (8, -8), (4,1), (5,8)}
2. {(0, -9), (-6, -6), (5,0), (2, 0)}
3. {(9,7), (8, 1), (1, –4), (-6, 2)}
4. {(9,7), (-3,2), (6,0), (-9, 2)}
The set of ordered pair that does not represent a function is option 1 {(4,0), (8, -8), (4,1), (5,8)}.
What is a function?A function in mathematics is a relationship between two sets in which every element of the first set (referred to as the domain) is connected to exactly one element of the second set (called the range). A function is typically represented by the symbol f(x), where x is a domain element and f(x) is a corresponding range element.
We know that, a set of ordered pairs represents a function if each input is associated with only one output.
From the given options we observe that, {(4,0), (8, -8), (4,1), (5,8)}, does not represent a function.
Hence, the set of ordered pair that does not represent a function is option 1 {(4,0), (8, -8), (4,1), (5,8)}.
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35 points
1475/2*pi=(3/4*r^2*pi)+(1/4*pi*(r-15)^2)+(1/4*pi*(r-25)^2)
STEP BY STEP PLEASE
Answer:
To solve for r, we can start by simplifying the equation:
1475/2pi = (3/4r^2pi) + (1/4pi*(r-15)^2) + (1/4pi(r-25)^2)
Multiplying both sides by 2*pi:
1475 = 3/4r^2pi2 + 1/4pi*(r-15)^22 + 1/4pi*(r-25)^2*2
1475 = 3/2r^2pi + 1/2pi(r-15)^2 + 1/2pi(r-25)^2
Multiplying both sides by 2:
2950 = 3r^2pi + pi*(r-15)^2 + pi*(r-25)^2
Distributing pi:
2950 = 3r^2pi + pir^2 - 30pir + 225pi + pir^2 - 50pir + 625pi
Combining like terms:
2950 = 5r^2pi - 80pir + 850*pi
Rearranging:
5r^2pi - 80pir + 850*pi - 2950 = 0
Simplifying:
5r^2pi - 80pir + 675*pi = 0
Dividing both sides by 5*pi:
r^2 - 16*r + 135 = 0
This is a quadratic equation, which can be solved using the quadratic formula:
r = (-(-16) ± sqrt((-16)^2 - 4(1)(135))) / (2(1))
r = (16 ± sqrt(256 - 540)) / 2
r = (16 ± sqrt(284)) / 2
r ≈ 1.7321 * 16 or r ≈ 8.2679
Since r represents the distance from the center of the octagon to a vertex, only the larger value of r makes sense in this context.
Therefore, r ≈ 8.2679 feet.
To find the area of the region in which the cow can graze, we can divide the octagon into eight congruent isosceles triangles with base 25 feet and height equal to the distance from the center to a side (which is equal to r).
The area of each triangle is (1/2)bh = (1/2)(25)(8.2679) = 103.3494 square feet.
Multiplying by 8 to account for all eight triangles:
8 * 103.3494 = 826.7952 square feet.
Rounding to the nearest square foot:
The area in which the cow can graze is approximately 827 square feet
Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find the probability of obtaining a reading less than 0.35°C.
Round your answer to 4 decimal places
The probability of obtaining a reading less than 0.35° C is approximately 35%.
What exactly is probability, and what is its formula?Accοrding tο the prοbability fοrmula, the likelihοοd οf an event οccurring is equal tο the ratiο οf the number οf favοurable οutcοmes tο the tοtal number οf οutcοmes. Prοbability οf an event οccurring P(E) = The number οf favοurable οutcοmes divided by the tοtal number οf οutcοmes.
The readings at freezing οn a set οf thermοmeters are nοrmally distributed, with a mean (x) οf 0°C and a standard deviatiοn (μ) οf 1.00°C. We want tο knοw hοw likely it is that we will get a reading that is less than 0.35°C.
To solve this problem, we must use the z-score formula to standardise the value:
[tex]$Z = \frac{x - \mu}{\sigma}[/tex]
Z = standard score
x = observed value
[tex]\mu[/tex] = mean of the sample
[tex]\sigma[/tex] = standard deviation of the sample
Here
x = 0.35° C
[tex]\mu[/tex] = 0° C
[tex]\sigma[/tex] = 1.00°C
Using the values on the formula:
[tex]$Z = \frac{0.35 - 0}{1}[/tex]
Z = 0.35
The probability of obtaining a reading less than 0.35° C is approximately 35%.
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what does -12x +24= equal
To solve the equation -12x + 24 = 0, we want to get x by itself on one side of the equation.
First, we can subtract 24 from both sides:
- 12x + 24 - 24 = 0 - 24
This simplifies to:
- 12x = -24
Next, we can divide both sides by -12:
- 12x / -12 = -24 / -12
This simplifies to:
x = 2
Therefore, the solution to the equation -12x + 24 = 0 is x = 2.