Question

WILL MEDAL!
Suppose p varies directly with d, and p=7 when d=3

What is the value of d, when p=28

Answer 1

I'm here

Answer 2

Use cross multiplication

Answer 3

?

Answer 4

show me how

Answer 5

The formula for this is y1/x1=y2/x2

Answer 6

y=p
x=d

Answer 7

So just plug the values in the variables. 7/3=28/x

Answer 8

Oh ok

Answer 9

Use cross multiplication to solve for x. 3 x 28 = 84

Answer 10

Then just divide 84 by 7

Answer 11

12

Answer 12

x = 12 :)

Answer 13

thanks man

Answer 14

Goodjob :D
You welcome :D

Answer 15

Thanks :D

Answer 16

ur welcome