Question

If X varies directly as Y, and X=35 when Y=5, find X when Y=7.

Answer 1

Y=K/X
5=k/35
k=175

Answer 2

y=kx
7=175/x
7x=175
x=25

Answer 3

how sure are you?
my grade depends on this!

Answer 4

yes i'm very sure :)
you need an explanation?

Answer 5

please

Answer 6

well inverse variation equation is xy=k

Answer 7

where k is the constant of variation

Answer 8

so i used the equation to find the "k" by plugging in x=35 and y=5
and k=175
then i plugged k back into the equation and as well as y, (which =7), and found out the value for x

Answer 9

and i tweaked the equation from xy=k to y=k/x because i'm most comfortable with it but you don't have to use it that way even though both would give the same values