## Amy876 3 years ago -5/8c = 20 a. -34 b. -32 c. 32 d. 34

1. ajprincess

1.Multiply both sides by 8 2.divide by -5 both sides

2. Amy876

That doesn't work

3. ajprincess

|dw:1347991198303:dw||dw:1347991271931:dw|

4. livelaughlilz

This is a proportion. -5/8c = 20/1 To solve a proportion, cross multiply 20(8c) = -5(1) 160c = -5 Then divide both sides by 160 c = -5/160 c = -1/32

5. Amy876

Ok which is it -32 or 32??

6. ajprincess

what do u think?

7. ajprincess

-32 or 32?

8. livelaughlilz

check both of them in the original equation

9. Amy876

with 32 I got -20 and with -32 it was WAY off, I'm confused now....

10. livelaughlilz

11. livelaughlilz

This is a proportion. -5/8c = 20/1 To solve a proportion, cross multiply 20(8c) = -5(1) 160c = -5 Then divide both sides by 160 c = -5/160 c = -1/32

12. Amy876

-1/32 is NOT an option

13. ajprincess

|dw:1347991694227:dw| Decide nw.

14. livelaughlilz

-1/32 checks... in addition this calculator said -1/32 is right as well: http://www.wolframalpha.com/input/?i=-5+%2F+8x+%3D+20 the multiple choice options are all wrong

15. Amy876

It was -32 Thanks AJ Princess! <3

16. ajprincess

yw.:)