Can someone help me please

A residual plot is a type of plot that is useful in assessing whether or not a linear regression model is appropriate for a set of data. The plot shows the residuals on the vertical axis and the independent variable on the horizontal axis. If the plot shows a pattern, then it indicates that the model is not appropriate for the data.

The instructor may have known that the linear model is incorrect because the residual plot showed a pattern. If the residuals are randomly distributed around zero, then it indicates that the linear model is appropriate for the data. However, if the residuals show a pattern, then it indicates that the linear model is not appropriate for the data. In this case, the instructor suggested that the student try a quadratic model because it is possible that the relationship between the variables is not linear but rather quadratic.

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Answer:

126

Step-by-step explanation:

4 is less than 126 so 126 > 4

Between 20 and 40 units per hour, the long-run average cost curve exhibits constant returns to scale. The statement that indicates between 20 and 40 units per hour, the long-run average cost curve exhibits constant returns to scale. This is option B.

In microeconomics, the long-run average cost (LRAC) is a method of showing the average expense per unit for a given level of production input. It is the cost of producing goods per unit using a specified number of inputs, such as labor and capital.

Long-run average cost is the average cost per unit of production after the company has adapted its production scale fully. As a result, the term "long-run" denotes a period in which all of the firm's inputs are variable.

The cost structure's shape is represented by the long-run average cost curve. The curve is determined by dividing the cost of producing goods by the number of goods produced. It aids in identifying the production rate at which a firm may generate the most output at the lowest cost.The long-run average cost curve depicts how the average cost of production varies with scale.

The curve might be downward-sloping, indicating economies of scale, flat, implying constant returns to scale, or upward-sloping, indicating diseconomies of scale, based on the company's production methods.

Hence, the answer is B.

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Answer:

Kim 52.5 miles, Darren 45 miles

Step-by-step explanation:

Kim drove 35 mph:

    35 mph x 1.5 hours = 52.5 miles

Darren drove 30 mph:

    30 mph x 1.5 hours = 45 miles

Reason:

The tree is already 48 inches tall. We add on 3x to represent the idea the tree is growing 3 inches per month. Therefore, the total height is 48+3x or 3x+48 inches.

Let's say x = 5 months have elapsed as an example.

The tree would have grown 3*x = 3*5 = 15 inches to get 48+15 = 63 inches tall. In other words, y = 3x+48 will have y = 63 when x = 5.

Given

Find

The value of x

Explanation

angle 2 and angle 4 are the interior angles on the same side of transversal. So these are supplementary angles

Final Answer

Therefore , the value of x is 15

Answer:

1 fourth of 52 is 13 so i think its 13 tell me if ibam wrong

Answer:

There is a 33% percent chance.

Step-by-step explanation:

You could use the formula, desired probability out of total outcome options

So basically, it would be 52/3 to get how much a fourth of the cards are, which is 13

13/52=0.25*100=25%

A poster of area 11760 cm2 has blank margins of 10 cm wide on the top and bottom and 6 cm wide on the sides. The dimensions that maximize the printed area are 500 cm x 23.52 cm.

The problem can be solved using the following concept:

Suppose we have a function f(x), then at the maximum/minimum point, it holds:

          f '(x) = 0

In the given problem, let:

q = length of the poster

p = width of the poster

Then,

p x q = 11760

or q = 11760/p

Let f(p,q) be the function of printed area, then:

f(p,q) = (p - 20)(q - 12)

f(p) = (p - 20) (11760/p - 12)

f(p) = -p² + 1000p - 980 x 20

At the maximum point:

f '(p) = 0

-2p + 1000 = 0

p = 500

Substitute p = 500 to get q:

q = 11760/p = 11760/500 = 23.52

Hence, the maximum printed area obtained if the dimensions are 500 cm x 23.52 cm

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Answer:

  5

Step-by-step explanation:

You have more than 1 each of 3- and 4-legged tables that have a total of 23 legs, and you want to know the number of 3-legged tables.

Let t and f represent the numbers of three- and four-legged tables respectively. Then we require ...

  3t +4f = 23 . . . . and t > 1, f > 1

The value 23 is clearly 5·4 +1·3, so we have one solution (t, f) = (1, 5). Increasing the number of 3-legged tables by 4 and decreasing the number of 4-legged tables by 3 will leave the number of legs unchanged. Then for some 'n', we have ...

  t = 1 +4n

  f = 5 -3n

The only solution that has t > 1 and f > 1 is the one for n=1:

  t = 1 +4·1 = 5 . . . . a total of 15 legs

  f = 5 -3·1 = 2 . . . . a total of 8 legs, making 23 when added to 15.

There are 5 three-legged tables.

__

Additional comment

There are formal methods for finding integer solutions to equations of the kind we wrote here. For this problem, it isn't necessary to go to that trouble, as we can "guess" a solution quickly.

A graphing calculator can also be helpful for finding solutions to the equation. This is shown in the attachment. The black points mark the "floor" values of the variables of interest (x=t, y=f).

Answer:

The answer is below

Step-by-step explanation:

Transformation is the movement of a point from its initial location to a new location. Types of transformation are rotation, reflection, translation and dilation.

Reflection is the flipping of a point about an axis. If a figure with point A(x, y) is reflected about the y axis, the new point is A'(-x, y)

The quadrilateral KLMN has vertices at K(-2, 6), L(-3, 8), M(-4, 4) and N(-3, 2). If the quadrilateral is reflected about the y axis, the new point is at:

K(2, 6), L(3, 8), M(4, 4) and N(3, 2)

The figure was plotted using geogebra online graphing tool.

Answer:

An expression is a number, a variable, or a combination of numbers and variables and operation symbols. An equation is made up of two expressions connected by an equal sign.

Step-by-step explanation:

Answer:

Step-by-step explanation:

x + 2x + 81 = 180

Subtract 81 from both sides of the equation

x + 2x = 99

Divide the equation by 2 on both sides

x = 49.5 degrees

The value of x in the giver figure is 33.

We have,

From the figure,

There is a triangle that contains x and 2x.

Now,

The sum of the angles inside the triangle is 180.

This means,

x + 2x + other angle = 180

Now,

The other angle is vertical to angle 81°

So,

Other angle = 81°

Now,

x + 2x + other angle = 180

x + 2x + 81 = 180

3x + 81 = 180

3x = 180 - 81

3x = 99

x = 33

Thus,

The value of x in the giver figure is 33.

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9514 1404 393

Answer:

  C.  The zeros are -1 and 5/2, because f(x) = (x + 1)(2x-5).

Step-by-step explanation:

The zeros of the function are the values that make the factors zero. The factors need to multiply out to give the original standard-form equation.

The sign of the constant (-5) tells you the product of the constants in the factors must be -5. That is only true for choices B and C.

Additionally, the x-term needs to match the result of multiplying out the factors.

  B.  (x -1)(2x +5) = 2x^2 +3x -5 . . . . . . . . . wrong x-term (not -3x)

  C.  (x +1)(2x -5) = 2x^2 -3x -5 . . . . . . . . . matches the given f(x)

The factors of C are zero when x=-1, x=5/2.

Answer: D.

Step-by-step explanation:

You can start out with the form AX = B and solve for matrix X that would yield the answer

Then X = (A^-1)(B)

A = [1    -1]

      [1     1]

A^-1 = (1/(1 - (1)(-1)))*[1    1]

                             [-1   1]

which can be written as (1/2) * [1    1]

                                                  [-1   1]

B = [26]

     [6]

(A^-1)(B) = (1/2)*[1    1] [6]

                        [-1   1] [26]

= (1/2)*[32]

          [20]

= [16]

  [10]

The quadratic function g(x) = (x - 5)² + 1 passes through the points (2, 10) and (8, 10) and has a vertex at (5, 1).

In this question we have a graph of a quadratic equation translated to another place of a Cartesian plane, whose form coincides with the vertex form of the equation of the parabola, whose form is:

g(x) = C · (x - h)² - k     (1)

Where:

By direct comparison we notice that (h, k) = (5, 1) and C = 1. Now we proceed to check if the points (x, y) = (2, 10) and (x, y) = (8, 10) belong to the parabola.

x = 2

g(2) = (2 - 5)² + 1

g(2) = 10

x = 8

g(8) = (8 - 5)² + 1

g(8) = 10

The quadratic function g(x) = (x - 5)² + 1 passes through the points (2, 10) and (8, 10) and has a vertex at (5, 1).

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Answer: B

Step-by-step explanation:

looked at the points from the dude above, or below, anyway i hope this helps

Answer:

The first option is answer

Step-by-step explanation:

Increasing interval:

Interval of values of x for which y increases.

In this question:

It increases for all values of x which are lower than -2.

So the answer is:

The first option is the answerwer.

Answer:

y = 2.5x + 0

Step-by-step explanation:

y = mx + c

11 = 5m + c

m = y2-y1/x2-x1

m = 10/4

11 = 5(2.5) +c

11= 11 + c

c= 0

Answer:

21/H = 40/57

Step-by-step explanation:

The expressions which is equivalent to the given expression; 3^(2x -3) is; the quantity 9 to the power of x end quantity over 27.

Option (A) is correct.

It is required to choose the expressions.

Index laws are the rules for simplifying expressions involving powers of the same base number. Index (indices) is the exponent which is raised to a number.

Given:

It follows from the task content that the equivalent expression as in the task content can be determined by the laws of Indices.

Now, according to laws of indices;

\(3^{2x} =( 3^{2}) ^{x}\)

Thus, we now have;

\(= (3^{2} )^{x} )/3^{3} \\= (9^{x} )/3^{3} \\= (9^{x} )/27\)

Therefore, the expressions which is equivalent to the given expression; 3^(2x -3) is; the quantity 9 to the power of x end quantity over 27.

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Answer:

a) 3x

b) 3x

c) 2 2/3 times greater

Step-by-step explanation:

The length of the rectangle:

The width of the rectangle is x. If you add the two widths together when finding perimeter, x + x, that would give you 2x.

Sum of widths: x + x = 2x

Use the sum of the widths to find the sum of the lengths by subtracting from the perimeter.

sum of lengths = perimeter - sum of widths

8x - 2x = 6x

Since there are 2 lengths divide by 2.

6x/2 = 3x

The length of the rectangle is 3x

Perimeter of the square:

The sides of the square are 1/4 of the length of the rectangle. "of" means to mulitply: (I made 3x a fraction by placing it over 1)

\(\frac{1}{4} (\frac{3x}{1} )\) = \(\frac{3}{4} x\)

Now find the perimeter of the square by multiplying the side length by 4.

\(\frac{3}{4}x(\frac{4}{1} )\) = \(3x\)

Last part:

solve the rectangle's perimeter by substituting x with 4.

P = 8x

P = 8(4)

P = 32 cm

Solve the square's perimeter by substituting x with 4.

P = 3x

P = 3(4)

P = 12 cm

Divide the rectangle's perimeter by the square's perimeter.

32/12 = 2 2/3 times bigger.

The fitted model log( ) = 1.6 - 0.2c is equivalent to the models y = 21.6 - 0.25(1+\(e^(1.6-0.2c)\)), y = 1.6 - 0.22/(1+\(e^(1.6+0.2)\)), and y = 1.6 - 0.22.

The fitted model log( ) = 1.6 - 0.2c represents a logarithmic relationship between the dependent variable and an independent variable, denoted as "c." To identify equivalent models, we need to examine the given options.

Option 1: y = 21.6 - 0.25(1+\(e^(1.6-0.2c)\))

This model is equivalent to the fitted model log( ) = 1.6 - 0.2c because the right side of the equation contains the term 1+\(e^(1.6-0.2c)\), which corresponds to the exponential function e^(1.6-0.2c). The coefficient -0.25 in front of the parentheses can be absorbed into the equation without altering its equivalence.

Option 2: y = 1.6 - 0.22/(1+\(e^(1.6+0.2)\))

This model is also equivalent to the fitted model because it contains the term 1+e^(1.6+0.2) in the denominator. The coefficient -0.22 in front of the fraction can be absorbed into the equation without changing its equivalence.

Option 3: y = 1.6 - 0.22

This model is a simplified version of the fitted model. It does not involve any exponential or logarithmic functions, but the coefficients 1.6 and -0.22 remain the same as in the original equation.

Therefore, the correct answers are options 1 and 2, as they preserve the logarithmic nature of the fitted model. Option 3 is not equivalent to the fitted model, as it lacks the logarithmic and exponential components.

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Answer:a

Step-by-step explanation:

The measure of angle ADC in quadrilateral ABCD is 115 degrees. The kite has congruent sides AB = CD and perpendicular diagonals.

Since AB = CD, we have two pairs of congruent sides, AB = CD and AD = BC, which means that the quadrilateral ABCD is a kite.

In a kite, the diagonals are perpendicular and one of the diagonals bisects the angles at the vertices where it meets the kite.

So, we draw the diagonal AC and use the fact that it bisects the angle ADC to find the measure of angle ADC. Let x be the measure of angle ADC. Then, we know that angle BAC is also x, since the diagonals of a kite are perpendicular.

Since angle BAC + angle BAD + angle DAC = 180 degrees (the sum of the angles in a triangle), we have:

x + 115 + (180 - 2x) = 180

Simplifying and solving for x, we get:

x + 115 + 180 - 2x = 180

295 - x = 180

x = 115

Therefore, the measure of angle ADC in quadrilateral ABCD is 115 degrees.

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_____The given question is incomplete, the complete question is given below:

In quadrilateral abcd, angle bad = 115  and AB=CD, What is the measure of adc in quadrilateral abcd? 45° 65° 115° 135°

Answer:
45.2x0.784

Step-by-step explanation:

This problem equals 35.4368, which has four decimal points

Answer:

x² - y² = 135

<=> (x - y)(x + y) = 135

<=> 15(x + y) = 135

=> x + y = 135/15 = 9

=> (x + y)² = 81

Answer:

Step-by-step explanation:

see attached image

The equations for the graphs are

Graph of cubic function

The equation of cubic function is

y = a(x - h)^3 + k

For horizontal inflection at (6, 1)

y = a(x - 6)^3 + 1

passing through point (10, 33)

33 = a(10 - 6)^3 + 1

32 = 64a

a = 32/64 = 1/2

hence the equation is: y = 1/2(x - 6)^3 + 1

Square root function

y = a√(x - h) + k

(h, k) is from (5, 6)

y = a√(x - 5) + 6

passing through point (9, -2)

-2 = a√(9 - 5) + 6

-2 = a√(4) + 6

-8 = 2a

a = -4

substituting results to

y = -4√(x - 5) + 6

Graph of cubic function

The equation of cubic function is

y = k - a(x - h)^3

For horizontal inflection at (-0.5, 2)

y = 2 - a(x + 0.5)^3

passing through point (-5, 38.45)

38.45 = 2 - a(-5 + 0.5)^3

38.45 -2 = -a(-4.5)^3

a = -36.45/(-4.5)^3 = 2/5

hence the equation is: y = 2 - 2/5(x + 0.5)^3

Square root function

y = a√(x - h) + k

(h, k) is from (-2, -11)

y = a√(x + 2) - 11

passing through point (2, -1)

-1 = a√(2 + 2) - 11

10 = a√(4)

10 = 2a

a = 5

substituting results to

y = 5√(x + 2) - 11

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Answer:

3/5=3/3×3/5=9/15

Step-by-step explanation:

that's the answer