## aliceglass20 Solve for x. 8/X=x/11 one year ago one year ago

1. completeidiot

x=X? or are they different variables?

2. aliceglass20

No I meant to make them the same.

3. completeidiot

do you know how to cross multiply?

4. aliceglass20

forgot

5. completeidiot

cross multiplication ex.|dw:1346962247300:dw|

6. aliceglass20

but how do you know what x and y are?

7. meylispena

|dw:1346962226871:dw|

8. completeidiot

it was just an example x and y were just random variables

9. meylispena

you cross multiply, the 8 with the 11 and the x combine like terms. you have to get rid of the exponent by applying the square root.

10. aliceglass20

I know but in my problem also, how would you multiply two variables if they're not numbers/

11. aliceglass20

the square root of 8x11?

12. completeidiot

$X*X=X^2$

13. meylispena

|dw:1346962422728:dw|

14. aliceglass20

So would the answer be either be 44 or 88? @completeidiot @meylispena ?

15. meylispena

you have to find the square root of 88.

16. aliceglass20

But the only answer choices are 44, 22 square root of 2, 2 square root 22, and 88..

17. completeidiot

$\sqrt{88}=\sqrt{4*22}=\sqrt{4}\sqrt{22}=2\sqrt{22}$

18. aliceglass20

Oh..

19. aliceglass20

Thank you:)

20. meylispena

what completeidiot said, lol.