Question

Simplify and write the expression with positive exponents only.
b^-3/b^-5

Answer 1

use the rule
\[x ^{-a}=\frac{ 1 }{ x ^{a} }\]

Answer 2

okay thanks :)

Answer 3

anytime :)

Answer 4

wait this is different because it has the variables and fractions.. idk how to set it up with the formula :( can you help me again?

Answer 5

\[\frac{ b ^{-3} }{ b ^{-5} }=\frac{ b ^{5} }{ b ^{3} }\]

Answer 6

ohhhh okay thank you!

Answer 7

do i just divide 5 and 2 after that?

Answer 8

the rule for that
\[\frac{ x ^{a} }{ x ^{b} }=x ^{a-b}\]

Answer 9

oh nvm then i had a diff one written down

Answer 10

but what do i do with the exponents of 5 and 2?

Answer 11

\[b ^{5-3}=b ^{2}\]

Answer 12

OHHH! i thought you put b^5-2. i was about to say 5-3=2

Answer 13

okay i got it lol

Answer 14

oh wait: my answer choices are different :(
a. b^-8
b. b^8
c. 1 /b^-8
d. 1/b^8

Answer 15

ohhhh okay i see what they did, i forgot about the add and subtracting rule. i put in my caculator -3-5 so it equaled -8

Answer 16

so it must be b^-8? :)