help

Question

help

jordanloveangel · Answer

http://static.k12.com/bank_packages/files/media/mathml_cd261e6460fd6e32d3d26fb17544d9fb68672628_1.gif

jordanloveangel · Answer

http://static.k12.com/bank_packages/files/media/mathml_a1aed1c176ce719b7131a95502ffeb4ec1af9645_1.gif

anonymous · Answer

what are the choices

jordanloveangel · Answer

there is no choices

anonymous · Answer

just a sec

jordanloveangel · Answer

kk and thx

anonymous · Answer

its either 8^-19 or 8^14/8^5
youll have to c what u r learning in your section

jordanloveangel · Answer

Core Focus: Working with Exponents

jordanloveangel · Answer

@SolomonZelman

danjs · Answer

Hi

danjs · Answer

$$\frac{ 8^{-5} }{ (8^{-7})^2 }$$

danjs · Answer

do you remember the rule, a power raised to a power, you multiply the powers together

jordanloveangel · Answer

wait dont u have 2 like divide?

danjs · Answer

$$(8^{-7})^2 = 8^{-7 * 2} = 8^{-14}$$

danjs · Answer

i would do that to the denominator first

danjs · Answer

$$\frac{ 8^{-5} }{ 8^{-14} } = \frac{ 8^{-5}*8^{14} }{ 1 } = 8^{-5 + 14} = 8^{9}$$

jordanloveangel · Answer

so then the answer becomes 9

danjs · Answer

If you move the number to the other side of the fraction, you change the sign on teh exponent, and when you multiply like bases raised to exponents, you add the exponents

danjs · Answer

$$\frac{ 1 }{ a ^{-b} } = \frac{ a ^{b} }{ 1 }$$      moving to other side of fraction
and
$$a^b*a^c = a ^{b+c}$$           addition of powers

danjs · Answer

and
power raised to a power
$$[a^b]^c = a ^{b*c}$$

danjs · Answer

those are the three rules

jordanloveangel · Answer

oh okay i see thx and so the answer would be 8^9 right

danjs · Answer

yep

jordanloveangel · Answer

oh okay thank you soooo much

danjs · Answer

write down those 3 rules, and notice the bases are the same, if the bases are different , you cant multiply or add the exponents

jordanloveangel · Answer

thats wut im doing lol

danjs · Answer

ha, cool

jordanloveangel · Answer

^_^