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4 years ago

Will give BRAINLIEST please helpASAP

Mathematics

1 answer:

Mama L [17]4 years ago

7 0

A)He earns $15 an hour because every time its going up by 15
for example ( 15, 30, 45, 75, 120, 150 )

B) carl earns more per hour

C) it would be graph like ( 1, 15 ) ( 2, 30 ) ( 3, 45 ) ( 4, 75 ) ( 5, 120 ) ( 6, 150 )

I hope this helped!

please mark this as brainiest! I need it!

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Could someone help me rnnn?

GuDViN [60]

Answer:

vertex = (0, -4)

equation of the parabola: $y=3x^2-4$

Step-by-step explanation:

Given:

y-intercept of parabola: -4
parabola passes through points: (-2, 8) and (1, -1)

Vertex form of a parabola: $y=a(x-h)^2+k$

(where (h, k) is the vertex and $a$ is some constant)

Substitute point (0, -4) into the equation:

$\begin{aligned}\textsf{At}\:(0,-4) \implies a(0-h)^2+k &=-4\\ah^2+k &=-4\end{aligned}$

Substitute point (-2, 8) and $ah^2+k=-4$ into the equation:

$\begin{aligned}\textsf{At}\:(-2,8) \implies a(-2-h)^2+k &=8\\a(4+4h+h^2)+k &=8\\4a+4ah+ah^2+k &=8\\\implies 4a+4ah-4&=8\\4a(1+h)&=12\\a(1+h)&=3\end{aligned}$

Substitute point (1, -1) and $ah^2+k=-4$ into the equation:

$\begin{aligned}\textsf{At}\:(1.-1) \implies a(1-h)^2+k &=-1\\a(1-2h+h^2)+k &=-1\\a-2ah+ah^2+k &=-1\\\implies a-2ah-4&=-1\\a(1-2h)&=3\end{aligned}$

Equate to find h:

$\begin{aligned}\implies a(1+h) &=a(1-2h)\\1+h &=1-2h\\3h &=0\\h &=0\end{aligned}$

Substitute found value of h into one of the equations to find a:

$\begin{aligned}\implies a(1+0) &=3\\a &=3\end{aligned}$

Substitute found values of h and a to find k:

$\begin{aligned}\implies ah^2+k&=-4\\(3)(0)^2+k &=-4\\k &=-4\end{aligned}$

Therefore, the equation of the parabola in vertex form is:

$\implies y=3(x-0)^2-4=3x^2-4$

So the vertex of the parabola is (0, -4)

5 0

3 years ago

Read 2 more answers

Angle A and Angle B are supplementary angles. If the measure of angle A = (6x + 10)° and the measure of angle B = (4x +30), then

omeli [17]

Answer:

86°

Step-by-step explanation:

Given:

A = (6x + 10)°

B = (4x +30)°

Two angles are supplementary if they sum up to 180° ;

A + B = 180°

Now insert the parameters and solve;

6x + 10 + 4x +30 = 180

10x + 40 = 180

10x = 140

x = 14

So;

B = (4x +30)° = 4(14) + 30 = 86°

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4 years ago

What is the answer to 3x-17=7x-9

GrogVix [38]

Answer:

x=-2

Step-by-step explanation:

-4x - 8 = -4 • (x + 2)

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3 years ago

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Tammy will run more than 28 miles this week. So far, she has run 18 miles. What are the possible numbers of additional miles she

gregori [183]

Answer:

Any number that is greater than 10

Step-by-step explanation:

Tammy is wanting to run more than 28 miles. Having already ran 18, she has to run 10 more to even reach 28 miles in total. She wants to run MORE than 28 so the number of miles she has yet to run in possibility is any number that is GREATER than 10.

ex: 11, 12,13, 14.....

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3 years ago

Susie is paying $540.15 every month for her $150,000 mortgage. If this is a 30 year mortgage, how much interest will she pay ove

GuDViN [60]

Answer:

17310.6

$540.15 multiply 30

because if they ask all in every month is 540.15

and she got 30 year

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3 years ago