Question

Suppose p varies directly with d, and p = 7 when d = 3. What is the value of d when p = 28?

A. 140/3


B. 4/3


C. 12

D. 16

Answer 1

@MathMusician

Answer 2

one sec

Answer 3

If p varies directly with d, then p = k * d

7 = k * 3, so k = 7/3

Now, use that value to find the value of d. You are also given that p = 28 in this case.

28 = (7/3)d ... now just solve this equation for d.
7d = 28 * 3
7d = 84
d = 12

Answer 4

Oh so it's C?

Answer 5

@PillowFace750 @ganeshie8

Answer 6

@andriod09

Answer 7

You already have the answer, hon. Why're you tagging others?

The question asked wonders what the value of "d" is, when "d" relates to "p", and as @Mathmusician has already explained, "d=12" would be the answer. :)

Answer 8

Oh, I thought that was something else xDD So it's C, thanks!

Answer 9

No problem! Don't forget to hand out a medal to who you felt helped you the most and also to close the question if you're done. :)