please show how u get to the answer please!
(8x)^-3 = 64
2006-11-28 15:35:39 · 5 answers · asked by JitterBug589 3 in Education & Reference ➔ Homework Help
thats to the negative third power, is your answer still right?
2006-11-28 15:42:36 · update #1
Remember: a negative exponent means an inverse. So:
(8x)^-3 = 64
(8x)^3 = 1/64
8x = 1/4
x = 1/32
2006-11-28 15:42:23 · answer #1 · answered by Anonymous · 0⤊ 0⤋
cube root both sides which gets rid of the ^3 and reduces 64 to 4, then divide both sides by 8, making x=1/2
2006-11-28 23:41:02 · answer #2 · answered by jonstanaut 1 · 0⤊ 0⤋
take the cube root of both sides which gives you
8x=4
then divide by 8
x=1/2
DIANE IS RIGHT IF ITS A NEGATIVE EXPONENT YOU HAVE TO TAKE THE INVERSE
2006-11-28 23:39:25 · answer #3 · answered by ? 2 · 0⤊ 0⤋
i think it would be
(8x)^-3=64
-8x=64
-8x/-8=64/-8(dividing both sides by neg 8)
x=-8
I hope you understand
2006-11-29 03:03:18 · answer #4 · answered by Shaniqua 3 · 0⤊ 0⤋
Cube both sides and then you get 2x=4 and then solve for x which gives you 2.
2006-11-28 23:40:09 · answer #5 · answered by Cree 2 · 0⤊ 0⤋