Question

Suppose "p" varies directly as "d", and p=2 when d=7. What is the value of "d" when p=10?
A. d=20/7
B. d=35
C. d=7/5
D. d=15

~Thanks ;)

Answer 1

@jim_thompson5910

Answer 2

"p" varies directly as "d" means that

p = k*d

Answer 3

p = 2 when d = 7

p = k*d

2 = k*7

k = ???

Answer 4

Still confused... I don't get what the deal is with k

Answer 5

k is just a constant

Answer 6

it's some fixed number

Answer 7

if 2 = k*7, then k must be ???

Answer 8

Ohhh... 2/7

Answer 9

good

Answer 10

p = k*d

p =(2/7)*d

10 = (2/7)*d ... plug in p = 10

now solve for d

Answer 11

B. d=35
Thanks! Was not as difficult as I was making it.

Answer 12

yeah it's not too bad once you get the hang of it