Question

Solve the proportion.

Answer 1

I would first "cross multiply"
can you do that?

Answer 2

5y^2=2000

Answer 3

looks good. any idea what the next step is ?

Answer 4

not sure

Answer 5

*any* idea ?

Answer 6

divide both sides by 5?

Answer 7

yes. that is a good idea. why ? because on the left side 5/5 is 1 which leaves us with y^2 without any number. that is closer to getting y by itself.

Answer 8

so it would be y^2=400 ?

Answer 9

yes.

Answer 10

that's it ?

Answer 11

to find y from y^2 you take the square root

to keep the equation in balance, you take the square root of both sides of the =