What are the slope and y-intercept of the line described by the equation
y= 4x - 7?

Answer:

Okay..

Step-by-step explanation:

Your are cunfoosing, help meh understand what ur sayin

Answer:

9. you did that right.

10.

A. x=4

B. (4,4)

C. (-∞,-∞)

11. you did not do it right and I will screenshot the answer.

Step-by-step explanation:

a graphing calculator helps a bunch with these types of problems. if you dont have one use demos an online graphing calculator.

9514 1404 393

Answer:

  10. see attached

  11. axis of symmetry: x=4; vertex: (4, 4); domain: all real numbers; range: y ≤ 4

  12. x = -4, -2

Step-by-step explanation:

10. Your graph is substantially correct. (You might do yourself a favor by adding points ±1 either side of the vertex. This will help to make the graph more rounded near the bottom.) The red graph in the attachment is the graph of this function.

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11. The vertex form of this equation is ...

  f(x) = -(x² -8x) -12 = -(x² -8x +16) -12 +16

  f(x) = -(x -4)² +4

This tells you the vertex is (4, 4). The axis of symmetry is the vertical line through the vertex, so is x=4. The domain of all polynomial functions is "all real numbers." This has a maximum at y=4, so the range is y ≤ 4.

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12. The vertex form of this equation is ...

  f(x) = (x +3)² -1

so the vertex is (-3, -1). Points at x = -3 ± 1 will be the x-intercepts, so the solutions to the equation f(x) = 0. The graph of it is the green graph in the attachment.

Answer:

A right-tailed test should be used to test whether there evidence that the average strength of the new fishing line is greater than 15 kilogram.

Step-by-step explanation:

Type of procedure:

We want to test if the breaking strength is greater than a value, which means that the type of procedure used to solve this question is a right-tailed test, which is when we find the probability of having a mean higher than the sample mean found.

Other types of procedures:

Not related to this question speficially, but to similar problems.

To test if a measure is less than another measure, the procedure used is a left-tailed test.

To test if a measure is different from another measure, the procedure used is a two-tailed test.

Answer:

[tex] (A)\displaystyle \begin{array} {ccc} \displaystyle y = - 2 \\ x - 2y = 6\\ \end{array} [/tex]

Step-by-step explanation:

since the line is horizontal and passes -2 the equation of the blue line should be

[tex] \displaystyle \large y = - 2[/tex]

remember The form of equation of a line

[tex] \displaystyle \boxed{ \displaystyle y = mx + b}[/tex]

where m is slope of the line and b is the y-intercept we can clearly see that the red line crosses y-axis at (0,-3) therefore b=-3

to figure out m we can consider the following formula:

[tex] \displaystyle m = \frac{ \Delta y}{ \Delta x} [/tex]

from the graph we acquire ∆y=1 and ∆x=2

thus substitute:

[tex] \displaystyle m = \frac{ 1}{ 2} [/tex]

so we have figured out m and b

therefore our equation of blue line is

[tex] \displaystyle y = \frac{1}{2} x - 3[/tex]

our given options are in standard form so

move -3 to left hand side and change its sign:

[tex] \displaystyle y + 3= \frac{1}{2} x [/tex]

cross multiplication:

[tex] \displaystyle 2y + 6= x[/tex]

move 6 to right hand side and x to left hand side and change its sign

[tex] \displaystyle - x + 2y = - 6[/tex]

multiply both sides by -1:

[tex] \displaystyle x - 2y = 6[/tex]

hence, our system of linear equation is

[tex] \displaystyle \begin{cases} \displaystyle y = - 2 \\ x - 2y = 6\\ \end{cases}[/tex]

Answer:

2

Step-by-step explanation:

652/3 = 217 1/3

Add 2 it becomes 654

654 / = 218

Answer:

I believe the smallest you can add is two, because 654 / 3 is 218.

Step-by-step explanation:

652 / 3 = 217.333333333

653 / 3 = 217.666666667

654 / 3 = 218

Answer:

A sample size of 392 is required.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of [tex]\pi[/tex], and a confidence level of [tex]1-\alpha[/tex], we have the following confidence interval of proportions.

[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

In which

z is the zscore that has a pvalue of [tex]1 - \frac{\alpha}{2}[/tex].

The margin of error is:

[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

18% of students struggle in their classes because they don't spend more than 8 hours studying independently outside of a 4-unit class.

This means that [tex]\pi = 0.18[/tex]

99% confidence level

So [tex]\alpha = 0.01[/tex], z is the value of Z that has a pvalue of [tex]1 - \frac{0.01}{2} = 0.995[/tex], so [tex]Z = 2.575[/tex].

You would like to be 99% confident that your estimate is within 5% of the true population proportion. How large of a sample size is required?

A sample size of n is required.

n is found when M = 0.05. So

[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

[tex]0.05 = 2.575\sqrt{\frac{0.18*0.82}{n}}[/tex]

[tex]0.05\sqrt{n} = 2.575\sqrt{0.18*0.82}[/tex]

[tex]\sqrt{n} = \frac{2.575\sqrt{0.18*0.82}}{0.05}[/tex]

[tex](\sqrt{n})^2 = (\frac{2.575\sqrt{0.18*0.82}}{0.05})^2[/tex]

[tex]n = 391.5[/tex]

Rounding up:

A sample size of 392 is required.

Answer:

25

Step-by-step explanation:

r = 6

19 + r

= 19 + 6

= 25

25 is the answer.

Answer:

The answer is 25

Step-by-step explanation:

19 + r; r = 6

19 + r

19 + 6 = 25

Thus, The answer is 25

-TheUnknownScientist

Answer:

19,958,400

Step-by-step explanation:

There are 12 ways the photographer could go in picking the first card.

After picking the first one, there will be 11 ways left for the second.

After picking the first one, there will be 10 ways left for the third, and so on...

So our answer = (12)(11)(10)(9)(8)(7)(6)(5) = 19,958,400

Answer: x = -30

Step-by-step explanation:

y = -20 by using process of elimination substitute y as -20 in either of the equations you get -30 for x

The solution to the system of equations is x = 390 and y = 50. The value of x is equal to 390.

To find the value of x, solve the system of equations using the method of  substitution . Let's use the method of elimination:

Given equations:

x - 12y = -210                      (1)

x - 6y = 90                          (2)

To eliminate x, we can subtract equation 2 from equation 1:

(x - 12y) - (x - 6y) = (-210) - 90

Simplifying the equation:

x - 12y - x + 6y = -210 - 90

-6y = -300

Divide both sides of the equation by -6:

y = -300 / -6

y = 50

Now, substitute the value of y back into either equation:

x - 6(50) = 90

Simplify the equation:

x - 300 = 90

Add 300 to both sides of the equation:

x = 90 + 300

x = 390

Therefore, the solution to the system of equations is x = 390 and y = 50.

Learn more about Substitution method here:

https://brainly.com/question/22340165

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Answer:

The answer of the first one is b

Step-by-step explanation:

going left is negative and going up is positive

Answer:

12. a

13a. (-3, 2)

13b.[tex]12\sqrt{2}[/tex]

13c. [tex]( x +3 )^2 + ( y - 2 )^2 = 288[/tex]

Step-by-step explanation:

13a. Graph endpoints and find the center, and to find the center we can use the midpoint formula.

[tex]midpoint = (\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})\\ = (\frac{-9+3}{2},\frac{-4+8}{2})\\= (\frac{-6}{2},\frac{4}{2})\\ = (-3,2)[/tex]

13b. Use given points and use distance formula to find radius.

[tex]distance = \sqrt{({x_2-x_1})^2+({y_2-y_1})^2}\\= \sqrt{({3-(-9)})^2+({8-(-4)})^2}\\= \sqrt{({3+9})^2+({8+4})^2}\\=\sqrt{({12})^2+({12})^2}\\ =\sqrt{({12})^2+({12})^2}\\= \sqrt{144+144} = \sqrt{288} = 12\sqrt{2}[/tex]

13c. Refer back to 13a and 13b to setup the equation of the circle.

[tex]( x - h )^2 + ( y - k )^2 = r^2\\( x - (-3) )^2 + ( y - 2 )^2 = (12\sqrt{2})^2\\( x +3 )^2 + ( y - 2 )^2 = 288[/tex]

Sorry if it looks long but I hope that helps!

Answer: Hello Luv.......

Factor the numerator and denominator and cancel the common factors.

−(81−1x+9x2)

Step-by-step explanation:

Hope this helps. Mark me brainest please.

Anna ♥

Answer:

yes the triangle is a right angle

Step-by-step explanation:

hope it helps good luck

Answer:

86

Step-by-step explanation:

the rectangle portion is 18*4= 72

1 triangle portion is 1/2bh where the base is 4 and height is 3.5

1/2*14=7

the 2nd triangle as the same proportions, so it is also 7

72+7+7=86

Answer:

Step-by-step explanation:

If its fractions, you would do 5/47

Answer:

Look below

Step-by-step explanation:

2/3  -  1/4 = m

Hope this Helps!

Answer:

24

Step-by-step explanation:

First you start by writing down all the combinations that start with each number. Then you just write the left over numbers and you'll end up with 24 because the is six of each starting number. Ex: 123, 132, 134, 143, 124, 142...

Answer:

the answer is B

Step-by-step explanation:

subtract 33 from 90

10

you 5×2=10

that how you get your answer

Answer:

about 23 minutes

Step-by-step explanation:

(65x35)/(65+35)= 2,275/100= 22.75 minutes (or 23 if rounded)

Answer:

50cm^2

Step-by-step explanation:

side length is square root 50 so you multiply  square root 50  by  square root 50 which gives you 50

Answer:

F

Step-by-step explanation:

9/15- ratio of two legs of the smaller triangle

13.5/x- ratio of two legs of the larger triangle

9/15= 13.5/x

cross multiply

9x= 202.5

x=22.5

9514 1404 393

Answer:

  right triangle

Step-by-step explanation:

Segment P1-P2 is horizontal of length 2-(-4) = 6. Segment P2-P3 is vertical of length 1-(-3) = 4. The horizontal and vertical sides are perpendicular to each other, so it is a right triangle. The sides are of different lengths, so it is a scalene triangle (not isosceles).

Answer:

F

Step-by-step explanation:

Answer:

129 cm

Step-by-step explanation:

The total height of all the people: 150 × 4 = 600 cm

The total height of Sally, Jackson and Tina: 145 × 3 = 435 cm

David’s height: 600 – 435 = 165 cm

Tina’s height: 165 + 5 = 170 cm

Jackson’s height: 170 × 4/5 = 136 cm

Therefore, Sally’s height: 600 – 165 – 170 – 136 = 129 cm

Thenks and mark me brainliest :))

The height of Sally will be 133 centimeters and the height of Jackson is 132cm.

The distribution of weights to the variables involved that establishes the equilibrium in the calculation is referred to as a result.

The average height of Sally, Jackson, Tina, and David is 150 cm per person. Then the equation is given as,

(S + J + T + D) / 4 = 150

S + J + T + D = 600  ...1

The average height of Sally, Jackson, and Tina is 145 cm per person. Then the equation will be

(S + J + T) / 3 = 145

S + J + T = 435      ...2

Tina is 5 cm taller than David. Then the equation will be

T = D + 5  ...3

Jackson is 4/5 as tall as David. Then the equation will be

J = (4/5)D    ...4

From equations, 1 and 2, then we have

435 + D = 600

D = 165 cm

From equation 4, then we have

J = (4/5) x 165

J = 132 cm

From equation 3, then we have

T = 165 + 5

T = 170 cm

From equation 2, then we have

S + 132 + 170 = 435

S = 133 cm

The height of Sally will be 133 centimeters.

More about the solution of the equation link is given below.

https://brainly.com/question/545403

#SPJ5

Answer:

47°

Step-by-step explanation:

the sum of total is 180

here if one is mentioned as 43 the other side is also 43

then, we get as 86 as we now found two side.

now 180-86=94

divide 94/3 and we get 47° is the answer.

PLEASE RECHECK THE ANSWER I HOPE ITS CORRECT

9514 1404 393

Answer:

  A.  -6

Step-by-step explanation:

The average rate of change on that interval is given by ...

  m = (f(0) -f(-1))/(0 -(-1)) = f(0) -f(-1)

  m = -3 -(3) = -6

The average rate of change on the interval is -6.

Answer:

Step-by-step explanation:

Answer:

128√5/3 mm³

Step-by-step explanation:

Since we are not told what to find, we can as well look for the volume of the pyramid

Volume of a square pyramid: V = (1/3)a²h

a is the side length of the square

h is the height of the pyramid

Given

a = 8mm

l² = (a/2)² + h²

l² = (a/2)² + h²

6² = (8/2)² + h²

h² = 6² - 4²

h² = 36 - 16

h² = 20

h = √20

Volume of a square pyramid =  (1/3)*8²*√20

Volume of a square pyramid = 1/3 * 64 * 2√5

Volume of a square pyramid = 128√5/3 mm³

Answer:

D.Every problem needs an equation in order to be able to solve it