Question

If 3^5=x, which of the following expressions is equal to 3^11

Answer 1

243x
3x^2
9x^4
27x^3
x^6
@Directrix

Answer 2

3^5=x
3^6*3^5=x*3^6
3^11=3^6 * x
3^11 = 729x

Answer 3

hmm

Answer 4

plug in 3^5 to ever x in your answer choices till you get 3^11

Answer 5

3^5 = x
square both sides
(3^5)^2 = x^2
3^10=x^2
multiply by 3
3*3^10 = 3x^2
3^11 = 3x^2

Answer 6

729x = 3x^2
@zzr0ck3r I guess this is a problem in regrouping.

Answer 7

@Directrix @timo86m @zzr0ck3r Thank you all :-) I have to go now.

Answer 8

Okay. Let's practice Geometry SAT tomorrow. @sakigirl

Answer 9

We should have a regular "Practice your SAT group" every night and do a few problems together. @Everybody

Answer 10

im there

Answer 11

@Directrix Agreed