At noon, the temperature on a mountaintop and the temperature on the ground had opposite values. The temperature on the mountaintop was 20° lower than temperature on the ground. What was the temperature in both places?

The correct answer is for the equation is C, "minimizes the sum of the squared distances from the actual y-value to the predicted y-value," as explained below.

The least-squares regression line is a line that best fits the given data by minimizing the sum of the squared distances between the predicted y-value (ŷ) and the actual y-value (y) for each data point. In other words, the line is chosen so that the sum of the squares of the vertical distances between the data points and the line is as small as possible.

In this case, the equation provided represents the least-squares regression line for the given data, which suggests that for every unit increase in x, y increases by 0.5 units.

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The surface area of the cylinder would be SA = 2π(1.6)² + 3.2π(3.8) square feet.

Option (A) is correct.

What is the surface area of the cylinder?

The surface area of a cylinder can be calculated using the following formula:

SA = 2πr² + 2πrh

where r is the radius of the circular base of the cylinder, h is the height of the cylinder, and π is the mathematical constant pi, approximately equal to 3.14159.

The surface area of a cylinder is the sum of the areas of its top and bottom circles, plus the area of its lateral surface (the curved surface that connects the two circles). The lateral surface area of a cylinder is found by multiplying the height of the cylinder by the circumference of one of its circular bases. Therefore, the correct method to calculate the surface area of the cylinder with diameter labeled 3.2 feet and height labeled 3.8 feet is:

SA = 2π(1.6)² + 3.2π(3.8)

So, the correct answer is:

SA = 2π(1.6)² + 3.2π(3.8) square feet

Hence, the surface area of the cylinder would be SA = 2π(1.6)² + 3.2π(3.8) square feet.

Option (A) is correct.

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The height of the plane is modeled by the linear equation:

height = 3000ft - 2000ft*t

If the rate at which the plane descends is constant, then the height is modeled by a linear equation.

We can write:

height = initial height - rate*time

We know that the initial height is 3000ft, and that the plane descends at ar ate of 2,000ft per minute, then we can write the linear equation:

height = 3000ft - 2000ft*t

Where t is the time in minutes.

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Complete question:

"an airplane 3,000 ft above the ground begin descending at a rate of 2,000 ft per minute​, which will be the height of the plane after t minutes?"

To schedule the examination so that no student has two examinations on the same day, we can use graph coloring. Graph coloring is the process of assigning colors to the vertices of a graph in such a way that no two adjacent vertices have the same color.

1. First, we can create a graph with the seven subjects as vertices and the pairs of subjects with common students as edges.
2. Next, we can assign a color to each vertex, starting with S1 and moving clockwise around the graph. We can use the smallest available color for each vertex, making sure that no two adjacent vertices have the same color.
3. Once we have assigned a color to each vertex, we can use the colors to schedule the examinations. Each color represents a different day, and all of the subjects with the same color can be scheduled on the same day.

The resulting schedule would look something like this:

Day 1: S1, S5
Day 2: S2, S4
Day 3: S3, S6
Day 4: S7

This schedule ensures that no student has two examinations on the same day, since no two adjacent vertices in the graph have the same color.

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The measure of the two angles is x = 69 degrees and y = 70 degrees.

In every triangle, the total of the angles is 180 degrees. The Triangle Sum Theorem.

For triangle ABC it is given as follows:

Angle A + Angle B + Angle C = 180.

Let us suppose the measure of two angles as x and y.

According to the ratio we can write as follows:

x = 6k and y = 7k

The sum of the angles in a triangle is 180°, so we can write:

50° + 6k + 7k = 180°

13k + 50° = 180°

13k = 130°

k = 10°

Substituting the value of k in x and y we have:

x = 6k = 6(10°) = 60°

y = 7k = 7(10°) = 70°

Hence, the measure of the two angles is x = 69 degrees and y = 70 degrees.

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Answer:

1 3/4

Step-by-step explanation:

To turn 7/4 into a mixed number, you have to look at the numerator and the denominator. 4 can go into 7 once (with 3 left over), so it would be 1 and 3/4

Answer:

56

Step-by-step explanation:

Twenty Six, perhaps?

Ryan, a consumer electronics​ salesperson, earns a base wage of ​$ 1300 per month and a commission of 7​% on the amount of sales he makes. One month Ryan received a $1622 paycheck, which made his sales for the month $4600.

To find the amount of Ryan's sales for the month, we can use the equation:

Total paycheck = Base salary + (Commission rate × Sales)

We can plug in the given values and solve for the amount of sales:

$1622 = $1300 + (0.07 × Sales)

$322 = 0.07 × Sales

Sales = $322 ÷ 0.07

Sales = $4600

Therefore, Ryan's sales for the month were $4600.

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The scale factor from triangle DEF to triangle D”E”F” is the ratio of the corresponding sides in the two triangles.

The coordinates of F” can be calculated using the scale factor.

The value of cos(D”) would be equal to 0.707. Similarly, the value of sin(D”) would be 0.707 and the value of tan(D”) would be 1.

Scale factor is a number which is used to describe the relationship between two objects or two measurements. It is used to compare two objects of different sizes in order to calculate the ratio of their size. It is also used to express a proportional relationship between two different measurements, such as their lengths, widths, heights or angles.

The corresponding sides are DE and D”E”, and EF and E”F”. We can calculate the ratio of the two sides by dividing the lengths of the two corresponding sides. For example, the ratio of DE to D”E” would be 12/16. We can do this for all three corresponding sides, and then take the average of the three ratios to get the scale factor from triangle DEF to triangle D”E”F”.

Since we know that the coordinates of F are (12,5), we can multiply the x-coordinate (12) by the scale factor and the y-coordinate (5) by the scale factor to get the coordinates of F”.

The angle D” can be used to calculate the values of cos(D”), sin(D”), and tan(D”). Since we know the angle D”, we can use the trigonometric functions to calculate the values of the trigonometric functions for that angle. For example, if the angle D” is 45 degrees, then the value of cos(D”) would be equal to 0.707. Similarly, the value of sin(D”) would be 0.707 and the value of tan(D”) would be 1.

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The height of the cone is approximately 13.5 feet.

The volume of a cone is given by the formula V = (1/3)πr²h, where V is the volume, r is the radius, and h is the height.

In this problem, we are given the volume of the cone, which is 1959.36 cubic feet, and the radius, which is 12 feet. We need to find the height, h.

We can start by plugging in the given values into the formula for volume:

1959.36 = (1/3)π(12)²h

Simplifying, we get:

1959.36 = 144πh

To solve for h, we need to isolate it on one side of the equation. We can do this by dividing both sides by 144π:

h = 1959.36 / (144π)

Using a calculator to evaluate this expression, we get:

h ≈ 13.5

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To find the exact value of s in the given interval that has the given circular function value, we can use the properties of the tangent function and the unit circle.

The tangent function is defined as the ratio of the opposite side to the adjacent side in a right triangle. In the unit circle, the opposite side is the y-coordinate and the adjacent side is the x-coordinate. Therefore, we can write:

tan s = y/x

Given that tan s = √3, we can write:

√3 = y/x

Cross-multiplying and simplifying, we get:

y = √3x

Now, we can use the Pythagorean theorem to find the value of x:

x^2 + y^2 = 1

Substituting y = √3x, we get:

x^2 + ( √3x)^2 = 1

Simplifying, we get:

4x^2 = 1

Dividing by 4, we get:

x^2 = 1/4

Taking the square root of both sides, we get:

x = ±1/2

Since we are looking for the value of s in the interval [????, 3????/2], we need to find the corresponding value of y for x = 1/2. Substituting x = 1/2 into y = √3x, we get:

y = √3(1/2)

Simplifying, we get:

y = √3/2

Therefore, the point on the unit circle that corresponds to the given value of the tangent function is (1/2, √3/2).

Now, we can use the properties of the unit circle to find the value of s. The angle s is the angle between the positive x-axis and the line connecting the origin and the point (1/2, √3/2). Since the point (1/2, √3/2) is in the first quadrant and the angle is measured counterclockwise, the value of s is:

s = π/3

Therefore, the exact value of s in the given interval that has the given circular function value is π/3.

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The matrix C of the linear transformation T(x) = B(A(x)) is:

[tex]\(C=\left[\begin{array}{ll}15 & 45 \\ 38 & 42\end{array}\right]\)[/tex]

We can find the matrix C of the linear transformation T(x) = B(A(x)) by multiplying the matrices A and B.

Recall that the matrix product of two matrices

[tex]\(A=\left[\begin{array}{ll}a_{11} & a_{12} \\ a_{21} & a_{22}\end{array}\right]\)[/tex]    and   [tex]\(B=\left[\begin{array}{ll}b_{11} & b_{12} \\ b_{21} & b_{22}\end{array}\right]\)[/tex]

is given by  

 [tex]\(C=AB=\left[\begin{array}{ll}a_{11}b_{11}+a_{12}b_{21} & a_{11}b_{12}+a_{12}b_{22} \\ a_{21}b_{11}+a_{22}b_{21} & a_{21}b_{12}+a_{22}b_{22}\end{array}\right]\)[/tex].

So, for

[tex]\(A=\left[\begin{array}{ll}3 & 9 \\ 8 & 6\end{array}\right]\)[/tex]       and   [tex]\(B=\left[\begin{array}{ll}5 & 0 \\ 2 & 4\end{array}\right]\)[/tex],

we have:

[tex]\(C=BA=\left[\begin{array}{ll}5 & 0 \\ 2 & 4\end{array}\right]\left[\begin{array}{ll}3 & 9 \\ 8 & 6\end{array}\right]=\left[\begin{array}{ll}5(3)+0(8) & 5(9)+0(6) \\ 2(3)+4(8) & 2(9)+4(6)\end{array}\right]=\left[\begin{array}{ll}15 & 45 \\ 38 & 42\end{array}\right]\)[/tex]

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The answer is an ordered pair (x,y)=(-7,2).

To solve the system of equations, we can use the elimination method to eliminate one of the variables and solve for the other.

First, let's multiply the first equation by 2 so that we can eliminate the y variable:

{20x+10y=−120

Next, let's subtract the second equation from the first:

{20x+10y−(20x−10y)==−120−(−80)

Simplifying the equation gives us:

{20y=40

Dividing both sides by 20 gives us:

{y=2

Now, let's plug this value of y back into the first equation to solve for x:

{10x+5(2)==−60

Simplifying the equation gives us:

{10x+10=−60

Subtracting 10 from both sides gives us:

{10x=−70

Dividing both sides by 10 gives us:

{x=−7

So, the solution to the system of equations is the ordered pair (x,y)=(−7,2).

Therefore, the answer is an ordered pair (x,y)=(-7,2).

I hope this helps! Let me know if you have any further questions.

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Therefore , the solution of the given problem of probability comes out to be roughly 0.2667, or 26.67%.

The primary goal of the schemes within a technique known as criteria is the evaluation of the likelihood that a claim is accurate or that a specific event will occur. Any figure between 0 and 1, with 0 typically signifying probability and 1 typically signifying a degree of certainty, can represent chance. A probability diagram shows the chance that a specific event will occur.

Here,

We can use combinations and probability to fix this issue.

First, we can determine how many different methods there are to choose 2 individuals from a group of 15:

=>  C(15,2) = 105 is the total number of options.

Next, we can determine how many options there are to choose two women from a group of eight women:

There are 28 different methods to choose 2 women, or

=>  C(8,2).

The likelihood that the two selected to respond to queries will both be women is as follows:

P(both women) equals the variety of methods to choose two women (total number of ways)

=>  P(all females) = 28/105

=> P(all females) = 0.2667

The likelihood that both of the two people selected to respond to questions are women is therefore roughly 0.2667, or 26.67%.

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The probability distribution function of Y = |X| is given by:
P(Y ≤ y) = P(|X| ≤ y) = P(-y ≤ X ≤ y) = P(X ≤ y) - P(X < -y)

Since X ~ N(0, 2), we can use the standard normal distribution to find the probabilities:
P(X ≤ y) = Φ(y/√2)
P(X < -y) = Φ(-y/√2)

Therefore, the probability distribution function of Y is:
P(Y ≤ y) = Φ(y/√2) - Φ(-y/√2)

To find E(|X|) and Var(|X|), we can use the properties of the absolute value function:
E(|X|) = ∫_(-∞)^(∞) |x| f(x) dx = 2 ∫_(0)^(∞) x f(x) dx
Var(|X|) = E(|X|^2) - (E(|X|))^2 = 2 ∫_(0)^(∞) x^2 f(x) dx - (2 ∫_(0)^(∞) x f(x) dx)^2

Since f(x) is the probability density function of X, we can substitute it with the standard normal distribution:
f(x) = (1/√(2π)) e^(-(x^2)/4)

Therefore, E(|X|) and Var(|X|) can be found by evaluating the integrals:
E(|X|) = 2 ∫_(0)^(∞) x (1/√(2π)) e^(-(x^2)/4) dx = √(2/π)
Var(|X|) = 2 ∫_(0)^(∞) x^2 (1/√(2π)) e^(-(x^2)/4) dx - (√(2/π))^2 = 2 - (2/π)

So the final answers are:
1. E(|X|) = √(2/π)
2. Var(|X|) = 2 - (2/π)

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Step-by-step explanation:

a=55 because

75+50+a=180 (Sum of angle in a stratight line)

or, 125+a=180

or, a=180-125

a=55

b=75 because they are alternate angles

c=50 because they are alternate angles

d=50 Because d=c(vertically opposite angle) and c=50

78 ft is the value of x in Triangles.

What is a triangle and what are its types?

Triangles are three-sided shapes. The various triangle varieties go under various names. The size of the angles and side lengths determine what kind of triangle it is (corners).

                         According on how long their sides are, triangles can be classified as equilateral, isosceles, or scalene.

Sin45° = x/110

  1/√2 = x/110

  √2 x  = 110

       x = 110/√2

       x = 77.78

        x = 78 ft

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1. The Formula used SA = 2w (l +h) + lh

2. The box is 0.37125 inch deep.

3. The SA of box with lid is 294.7972 inch².

The area is the territory covered by a shape or figure, whereas the perimeter is the distance covered by the shape's outside boundary. The unit of area is the square unit or unit², while the unit of perimeter is the unit.

Given:

length = 13.2 inch

Height = 10.5 inch

And, Surface Area used = 295.02 inch²

Using the Formula

SA = 2lw + 2wh + lh

SA = 2w (l +h) + lh

295. 02 = 2w ( 13.2 + 10.5) + (13.2)(10.5)

147.51 = w x 24 + 138.6

8.91 = 24w

w = 0.37125 inch

SA of box with lid

= 2( lw+ wh + lh)

= 2( 13.2 x 10.5 + 10.5 x 0.37125 + 0.37125 x 13.2)

= 2(138.6 + 3.8981 + 4.9005)

= 2 x 147.3986

= 294.7972 inch²

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The answer to the question "(1) 42mod11" is 9.

The answer to the question "Modular Arithmetic: Please solve the following questions. (1) 42mod11" is:

The concept of "Modular Arithmetic" is a system of arithmetic that involves only integers. In modular arithmetic, numbers "wrap around" after they reach a certain value called the modulus.

To solve the given question, we can use the following steps:

Step 1: Find the modulus of the given number. In this case, the modulus is 11.

Step 2: Divide the given number by the modulus. In this case, 42/11 = 3 with a remainder of 9.

Step 3: The remainder is the answer to the question. So, 42mod11 = 9.

Therefore, the answer to the question "(1) 42mod11" is 9.

I hope this answer helps you! If you have any further questions, feel free to ask.

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The solution to the system of equations is (5.56, -4.73).

To solve the system of equations by the addition method, we need to follow these steps:

Step 1: Multiply one or both of the equations by a constant to make the coefficients of one of the variables the same in both equations.
Step 2: Add the two equations together to eliminate one of the variables.
Step 3: Solve for the remaining variable.
Step 4: Substitute the value of the variable back into one of the original equations to find the value of the other variable.

Let's apply these steps to the given system:

-2x - 7y = 22
7x - 4y = -20

Step 1: Multiply the first equation by 7 and the second equation by -2 to make the coefficients of x the same:

-14x - 49y = 154
-14x + 8y = 40

Step 2: Add the two equations together to eliminate x:

-41y = 194

Step 3: Solve for y:

y = 194/(-41)
y = -4.73

Step 4: Substitute the value of y back into one of the original equations to find the value of x:

-2x - 7(-4.73) = 22
-2x + 33.11 = 22
-2x = -11.11
x = 5.56

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Answer:

The description that matches the translation of the equation y = |x - 5| + 2 is "Moves 5 units to the right and 2 units up".

This is because the equation involves the absolute value of the quantity (x - 5), which means that the expression inside the absolute value bars will always be positive or zero. This means that the graph of the equation will be a "V" shape, centered at x = 5, and opening upwards. The "+2" outside the absolute value bars indicates that the entire graph will be shifted upward by 2 units.

Therefore, the graph of the equation y = |x - 5| + 2 will be obtained by taking the graph of y = |x|, shifting it 5 units to the right to obtain y = |x - 5|, and then shifting it 2 units up to obtain y = |x - 5| + 2.

Step-by-step explanation:

pa brainliest pls

Using a graphing calculator or algebraic methods, we can find that x ≈ 71.6. Therefore, the model projects the civilian labor force to be 152 million in the year 1950 + 71.6 = 2021.6, or approximately in the year 2022.

According to the given model, the size of the civilian labor force (in millions) for selected years from 1950 and projected to 2050 can be modeled by y = - 0.0001 x^3 + 0.0058 x^2 + 1.43x + 56.7, where x is the number of years after 1950.

To find the projected civilian labor force in 2013, we need to plug in the value of x as 2013-1950 = 63 into the given model:

y = - 0.0001 (63)^3 + 0.0058 (63)^2 + 1.43(63) + 56.7
y = - 0.0001 (250047) + 0.0058 (3969) + 90.09 + 56.7
y = - 25.0047 + 23.0002 + 90.09 + 56.7
y = 144.7855

Therefore, the model projects the civilian labor force to be approximately 144.7855 million in 2013.

To find the year when the model projects the civilian labor force to be 152 million, we need to set y = 152 and solve for x:

152 = - 0.0001 x^3 + 0.0058 x^2 + 1.43x + 56.7
0 = - 0.0001 x^3 + 0.0058 x^2 + 1.43x - 95.3

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1.  Based on the given stock-out level, the corresponding Z-value is 1.96. 2. The safety stock level is 12. 3. The pharmacy store should place orders when the inventory level drops to 332 bottles. 4. The pharmacy store changing the stock-out probability to 4%, should place orders when the inventory level drops to 331 bottles.

1. The corresponding Z-value for a stock-out level of 2.5% is 1.96. This can be found by looking at a standard normal table or using a Z-value calculator.

2. The safety stock level can be calculated using the formula:

Safety stock = Z-value * standard deviation of lead time demand.

In this case, the standard deviation of lead time demand is the square root of the variance, or 6 bottles. So the safety stock level is:

= 1.96 * 6 = 11.76

which should be rounded up to the next whole number, or 12 bottles.

3. The pharmacy store should place orders when the inventory level drops to the reorder point, which is calculated using the formula:

Reorder point = Lead time demand + Safety stock.

In this case, the lead time demand is 16 days * 20 bottles/day = 320 bottles.

So the reorder point is 320 + 12 = 332 bottles.

Therefore, the pharmacy store should place orders when the inventory level drops to 332 bottles.

4. If the pharmacy store wants to change the stock-out probability to 4%, the corresponding Z-value is 1.75. Using the same formula as before, the safety stock level is:

= 1.75 * 6 = 10.5, which should be rounded up to the next whole number, or 11 bottles.

The reorder point is then 320 + 11 = 331 bottles. Therefore, the pharmacy store should place orders when the inventory level drops to 331 bottles.

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The probability that the first sister wins the first prize, the second sister wins the second prize, and the third sister wins the third prize is given as follows:

1/1320.

A probability is calculated as the division of the desired number of outcomes by the total number of outcomes.

The probabilities for each sister are given as follows:

Hence the probability is given as follows:

1/12 x 1/11 x 1/10 = 1/(12 x 11 x 10) = 1/1320.

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The real zeros of the given polynomial P(x) = x³ - 9x² + 20x - 12 are 3 and 2. The real zeros of the given polynomial P(x) = x³ - 9x² + 20x - 12 can be found by factoring the polynomial and setting each factor equal to zero.

Step 1: Factor the polynomial
P(x) = x³ - 9x² + 20x - 12
= (x - 3)(x - 2)(x - 2)

Step 2: Set each factor equal to zero and solve for x
x - 3 = 0 => x = 3
x - 2 = 0 => x = 2
x - 2 = 0 => x = 2

Step 3: The real zeros of the polynomial are the values of x that make each factor equal to zero.
So, the real zeros of the polynomial are x = 3 and x = 2.

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The multiplication expression will be (9*3+1)/3.

What exactly are expressions?

In mathematics, an expression is a combination of one or more numbers, variables, and/or mathematical operations (such as addition, subtraction, multiplication, division, exponentiation, and logarithms) that can be evaluated to produce a single numerical or algebraic value.

Expressions can be very simple, such as a single number or variable, or they can be more complex, involving multiple variables and operations. They can also include mathematical functions and constants, such as pi or the square root of a number.

Here are some examples of expressions in mathematics:

Now,

We have expression 9 1/3

and to change it to simple fraction

we do this 9*3+1/3

=27+1/3

=28/3

Hence,

           The multiplication expression will be (9*3+1)/3.

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Answer:

こんにちは

Step-by-step explanation:

2. 答えは2.5

次の番号 3 の場合は 6.9 次の番号は 4 の場合は 5.6