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ozzi
2 years ago
6

Miss lead says that if y varies directly with x and y=15 when x=-3, then y=-20 when x=4. Is she correct? Answer in complete sent

ences and show work. (PLEASE ANSWER ASAP)
Mathematics
1 answer:
gizmo_the_mogwai [7]2 years ago
6 0

Answer:

Yes,  she is correct.

Step-by-step explanation:

y = kx   is direct variation

15 = k*-3

k = -5.

So the equation of variation is

y = -5x

When x = -4:

y -5*-4 = 20.

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Llana [10]

Answer:

272

Step-by-step explanation:

The formula is 2(LxW) + 2(LxH) + 2(WxH)

2(16 x 4) = 128

2(16 x 4) = 128

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16 + 128 + 128 = 272

5 0
3 years ago
Michael is 3 times as old as Brandon. 18 years ago, Michael was 9 times as old as Brandon.
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I hope this helps you


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3 years ago
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Step-by-step explanation:

8 0
3 years ago
Josiah invests $360 into an account that accrues 3% interest annually. Assuming no deposits or withdrawals are made, which equat
vlabodo [156]

Answer:

y = 360(1.03)x

Step-by-step explanation:

F = P x (1 + i)^n

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Thus, the amount after x years which is increased by 3%.

Since, this amount represented by y,

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Therefore, the required equation that represents the amount of money in Josiah’s account, y, after x years is,

y = 360(1.03 )^x

Hope this helps you!

Have a nice evening! ;)

5 0
3 years ago
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Answer:

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3 years ago
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