Identify the type of regression that returns the equation y = x^2 + 7x - 15.
A. linear
B. quadratic
C. exponential
D. power

C = π d

C = (22/7) × (35/2) = (22/2)(35/7) = 11(5) =55

Answer: 55, second choice

Step-by-step explanation:

It is the solution. Mark as brainlist.

Answer:

Yes

Step-by-step explanation:

Given the system of equations

[tex]\begin{aligned} &y=2x +1 \\\\ &x-y=-3 \end{aligned}[/tex]

We want to determine if (2,5) is a solution of the system.

We can do this by substitution of the given point into the equations and see if it holds.

Given (x,y)=(2,5), x=2, y=5

In the first equation

y=2x+1

5=2(2)+1

5=5

Therefore, the point (2,5) satisfies the first equation.

In the second equation

[tex]x-y=2-5=-3[/tex]

Since our result (-3) is equal to the Right Hand Side, the point also satisfies the second equation.

Therefore, (2,5) is a solution of the system.

Answer:

2

Step-by-step explanation:

Answer:

18

Step-by-step explanation:

Coin # 1 - 2 outcomes

Coin # 2 - 2 outcomes

Number cube - 6 outcomes

Total outcomes: 2 x 2 x 6 = 24

However, if “heads and tails” is considered the same as “tails and heads” (order doesn’t matter):

Coins outcomes: 3

Cube outcomes: still 6

Total outcomes: 18

Answer:

The coordinates of point B are (-2, 2)

Step-by-step explanation:

We have two points: A and C.

The coordinates for A are (2, -8) and the coordinates for C are (-4, 7).

We have to find the coordinates of the point B, that satisfies the condition that the distance AB is 2 times the distance BC.

We also know that B is a point of the line AC.

We can calculate the line AC as a linear function y=mx+b.

The slope m is:

[tex]m=\dfrac{y_c-y_a}{x_c-x_a}=\dfrac{7-(-8)}{-4-2}=\dfrac{15}{-6}=-2.5[/tex]

Then, the y-intercept b can be calculated using the coordinates of one of the points, in this case point A:

[tex]y=-2.5x+b\\\\b=y_a+2.5x_a=-8+2.5*2=-8+5=-3[/tex]

Then, we know that B is a point of the linear function y=-2.5x-3, within the range x ∈ (-4; 2).

To have a ratio AB to BC of 2 to 1, we can divide the length of the line AC in 3 parts, and the point B will be located in the  end of the segment nearer to point C.

In the picture attached, you can see the division of the segment AC in three parts and the location of point B=(x, y).

Applying the Thales theorem, we can divide the segment in the y-axis in three and calculate y, and the same for the x-axis.

Then, the coordinate y for the point B is:

[tex]y=y_c-(y_c-y_a)/3\\\\y=7-[7-(-8)]/3=7-15/3=7-5=2\\\\\\x=x_c-(x_c-x_a)/3\\\\x=-4-(-4-2)/3=-4-(-6)/3=-4+2=-2[/tex]

Then, the point B has coordinates (-2, 2).

We can verify the distances as:

[tex]AB=\sqrt{(2-(-2))^2+((-8)-2)^2}=\sqrt{16+100}=\sqrt{116}\\\\\\BC=\sqrt{((-2)-(-4))^2+(2-7)^2}=\sqrt{4+25}=\sqrt{29}\\\\\\\dfrac{AB}{BC}=\dfrac{\sqrt{116}}{\sqrt{29}}=\sqrt{\dfrac{116}{29}}=\sqrt{4}=2[/tex]

Answer: (-2,2)

Step-by-step explanation:

Answer:

476ft^3

Step-by-step explanation:

Base area =length × width

= 7 × 4 = 28ft^2

Volume = base area × height

= 28 × 17 = 476ft^3

Answer:

3x (x² + x + 1)

You could write any trinomial like this

Answer:

[tex]g(\frac{1}{2}) = 0.5[/tex]

The input is [tex]x = \frac{1}{2}[/tex] and the output is [tex]g(x) = g(\frac{1}{2}) = 0.5[/tex]

Step-by-step explanation:

Suppose we have a function g(x) = a. The input is the value of x and the output is the value of g.

In this question:

[tex]g(x) = 2x^{2}[/tex]

We want g(1/2) = g(0.5). So

[tex]g(0.5) = 2*(0.5)^{2} = 2*0.25 = 0.5[/tex]

[tex]g(\frac{1}{2}) = 0.5[/tex]

The input is [tex]x = \frac{1}{2}[/tex] and the output is [tex]g(x) = g(\frac{1}{2}) = 0.5[/tex]

Answer:

The number is -2

Step-by-step explanation:

12 less than 7 times a number can be express as follows,

let the number = a

7a - 12

According to the question the number 7a - 12 is equals to 32 less than the product of - 3 and the number.

32 less than the product of -3 and the number can be express below.

-3a - 32. Therefore,

7a - 12 = -3a - 32

collect like terms

7a + 3a = - 32 + 12

10a = -20

divide both sides by 10

a = -20/10

a = -2

The number is -2

Answer:

Step-by-step explanation:

H0: μ1____ μ2For Q17(circle one: equal to, less than or equal to, greater than or equal to, not equal to )

H1 : μ1____ μ2For Q18(circle one: equal to, less than, greater than, not equal to )

Formula for calculating the the test:

t = [ (x₁ - x₂) - d ] / sqrt[(s₁²/n₁) + (s₂²/n₂)]

where x₁ = 37.6, x₂ = 39.3, d = 0 assuming equality = 37.6 - 39.3 = -1.7

s₁² = 4.92 = 24.01, s₂² = 2.72 = 7.29, n₁ = 50, n₂ = 58.

thus, t = [ (-1.7) - (0)] / √(24.01/50) + (7.29/58)

    t = (-1.7) / (0.4802 + 0.1257)

   t = -1.7 / 0.6059

   t = -2.8057. = -2.81

P value:

Lets find the degree of freedom:

DF = (s₁²/n₁ + s₂²/n₂)² / { [ (s₁² / n₁)² / (n₁ - 1) ] + [ (s₂² / n₂)² / (n₂ - 1) ] }

DF = (24.01/50 + 7.29/58)² / {[(24.01 / 50)² / 50-1)] + (7.29/58)² / 58-1)]}

DF = (0.4802 + 0.1257)² /{[ (0.4802)²/49] + (0.1257)²/57)]}

DF = (0.6059)²/ (0.00471 + 0.00028)

DF = 0.3671 / 0.00499 = 75.37

Thus, P value = 0.9968 using a t distribution calculator.

Decision/Conclusion: Since the P value 0.9968 is greater than α (.05), Fail to Reject H0, There is not sufficient evidence to warrant the rejection of the claim.

Answer:

x = 3

Step-by-step explanation:

We are told that the length of a side of the square is x.

Now, perimeter of square = 4 × side length

Perimeter of square = 4x

Also,we are told that the triangle is equilateral and a side is (x + 1).

Thus, perimeter of triangle = 3(x + 1)

Since we are told that the perimeter of the square is equal to that of the equilateral triangle. Thus;

4x = 3(x + 1)

4x = 3x + 3

Subtract 3x from both sides to get;

4x - 3x = 3

x = 3

Answer:

pretty sure it's C

Step-by-step explanation:

The formula to find the area of a triangle is :

1/2 base*height

For instance:

base=4 cm

height=5cm

area of traingle=1/2*b*h

=1/2*4*5

=10cm^2

Hope it helps...

Good luck on your assignment

Answer:  3.5 pounds

Step-by-step explanation:

17+12.5=29.5

33-29.5=3.5

Answer:

36 ÷ 3 = j

Step-by-step explanation:

The quotient of 36 and 3 is '36 ÷ 3'.

'Is j' would be '= j'.

Put it together, and you get:

36 ÷ 3 = j

'j = 12'

[tex]\frac{36}{3} = j\\\\\text {Divide the two numbers: }36/3 = 12\\\boxed {12=j}[/tex]

Brainiest Appreciated

Answer:

[tex]1\dfrac{3}{5}[/tex]

Step-by-step explanation:

Because these two triangles are similar:

[tex]\dfrac{4}{5}=\dfrac{x}{2}\\x=\dfrac{8}{5}=1\dfrac{3}{5}[/tex]

Hope this helps!

Answer:

1. a

2. d

3. b

4.a

5 d

6. b

7. b

8.a

9. d

10. a

Answer:

[tex] \frac{337}{4} [/tex]

Step-by-step explanation:

[tex]84 \frac{1}{4} = \frac{84 \times 4 + 1}{4} = \frac{336 + 1}{4} = \frac{337}{4} [/tex]

Formula for circumference that involves the radius ⇒ C = 2πr

Since we are given that the circumference is 86 cm, substitute it in.

86 = 2πr

Now, π is equal to approximately 3.14 so we can

plug 3.14 in for π and we have 86 cm = 2(3.14)r.

Now solve the equation.

2(3.14) is 6.28 and we have 86 cm = 6.28r.

Now divide both sides by 6.28 and we have 13.6942 = r.

So the radius of the hula hoop is 13.6942 cm.

Answer:

43

Step-by-step explanation:

Answer:

Step-by-step explanation:

Money markets accounts offer a annual percentage yield which is higher compared to other types of savings accounts

These accounts also require a higher minimum deposits to get a higher rate

These accounts may also be insured and secured by the Federal Deposit Insurance Corp in banks and the National Credit Union Administration in credit unions.

They are also relatively easy to access.

Answer:

factoring

Step-by-step explanation:

Answer:

Quadratic formula is the best

I think these are the answers:

a) 12 outcomes

b) 1/12

c) 1/6

Answer:

(C) Sample: the 120 students surveyed. Population: the 1200 students at the high school. Parameter of interest: the average number of hours a student at this high school sleeps per night.

Step-by-step explanation:

The correct answer is (C). The sample is a subset of the population, and the parameter is a characteristic of the population of interest.

Answer:

The correct option is C

Step-by-step explanation:

The average variation is spread out more than the middle 50% of the data.

Answer:

48

Step-by-step explanation:

This is a linear equation, it goes as follows:

[tex]105(x) - 95(x) = 480[/tex]

x stands for hours.

Solving for x yields 10.

Keep in mind that 105 and 95 are miles per hour where 480 is miles. So multiplying [tex](\frac{miles}{hours}) (hours)[/tex] gives off hours which is what we are looking for.

Hope this helps.

Answer:

π∫52(ey3)2dy

The work I did to solve this equation:

Step 1

ln(3x)=2

3x=2e

x=2e3

Step 2

ln(3x)=5

3x=5e

x=5e3

Step 3

y=ln(3x)⟺ey=3x⟺ey3=x

Step 4

π∫52(ey3)2dy

Answer:

4. A unique solution exists in the region consisting of all points in the xy-plane except the origin.

Step-by-step explanation:

Given:

[tex] (x^2 + y^2)y' = y^2[/tex]

Solving the differential equation, we have:

[tex] \frac{dy}{dx} = \frac{y^2}{x^2 + y^2}[/tex]

Thus, except at (0,0), for all real values of x and y, the function[tex] \frac{y^2}{x^2 + y^2}[/tex] is defined.

The (0,0) values of x&y causes the denominator to be 0, so the function is not defined at this (0,0) condition.

Therefore,

[tex] \frac{d}{dy} \frac{y^2}{x^2 + y^2} = \frac{x^2 + y^2 (2y) - y^2 (2y)}{(x^2 + y^2)^2} [/tex]

[tex] = \frac{2x^2y + 2y^3 - 2y^3}{(x^2 + y^2)^2} [/tex]

[tex] = \frac{2x^2y}{(x^2 + y^2)^2} [/tex].

Apart from the point of origin (0,0), this is continuous.

This means a unique solution exists in the region consisting of all points in the xy-plane except the origin.

Answer:

5 ≥ p

Step-by-step explanation:

Add 5 to both sides:

0 ≥ p - 5

+5      + 5

________

5 ≥ p

Answer:

p <= 5

Step-by-step explanation:

Let's solve your inequality step-by-step.

0≥p−5

Step 1: Flip the equation.

p−5≤0

Step 2: Add 5 to both sides.

p−5+5≤0+5

p≤5

Answer:

p≤5

Answer:

A) We are 96% confident that the population mean time required for all students who take this test is somewhere between 49.8 and 75.0 minutes

Step-by-step explanation:

x% confidence interval is between a ± b.

a is the sample mean.

b is the margin of error.

Interpretation: We are x% sure that the population mean is between a-b and a+b.

In this question:

96% confidence interval for the mean time that students will require to complete a particular examination. Between 62.4 - 12.6 = 49.8 minutes and 62.4 + 12.6 = 75 minutes.

The correct interpretation is that we are 96% sure that the population mean is in this interval.

So the correct answer is:

A) We are 96% confident that the population mean time required for all students who take this test is somewhere between 49.8 and 75.0 minutes

Answer:

The confidence interval for the true mean is given by the following formula:

[tex]\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}[/tex]   (1)

The confidence interval for this case i given by:

[tex] 62.4 -12.6 \leq \mu \leq 62.4+12.6[/tex]

[tex] 49.8 \leq \mu \leq 75.0[/tex]

For this case we can conclude that the true mean for the time that students will require to complete a particular examination is between 49.8 and 75.0 minutes. And the best option for this case by:

A) We are 96% confident that the population mean time required for all students who take this test is somewhere between 49.8 and 75.0 minutes

Step-by-step explanation:

The confidence interval for the true mean is given by the following formula:

[tex]\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}[/tex]   (1)

The confidence interval for this case i given by:

[tex] 62.4 -12.6 \leq \mu \leq 62.4+12.6[/tex]

[tex] 49.8 \leq \mu \leq 75.0[/tex]

For this case we can conclude that the true mean for the time that students will require to complete a particular examination is between 49.8 and 75.0 minutes. And the best option for this case by:

A) We are 96% confident that the population mean time required for all students who take this test is somewhere between 49.8 and 75.0 minutes

Answer:

b

Step-by-step explanation:

Answer:

we need picture

Step-by-step explanation:

Answer:

G 0.04 Times D

Step-by-step explanation:

A parallelogram

P=2(a+b)

The answer is 64

P=2(a+b)=2·(24+8)=64