Homework Help: math

Posted by Yoda on Thursday, September 6, 2012 at 5:49pm.

1. Which exponent makes the statement true? 1/5^9 = 5^?

a. 9
b. -9
c. 1/9
d. - 1/9

2. y^5 x y^14 =

a. 2y^19
b. y^60
c. y^19
d. 2y^60

3. w^12/w^18 =

a. w^30
b. w^-30
c. w^6
d. w^-6

5. 5^5/5^2 =

a. 5^1
b. 5^2
c. 5^3
d. 5^4

Please help me this is all like greek too me. My teacher taught me how and i still don't get it.

math - Reiny, Thursday, September 6, 2012 at 6:01pm
1.
(1/5)^9
= 5^-9

2. y^6 x y^14 = y^20
when multiplying powers with the same base, keep the base and add the exponents

3. w^12 / w^18 = w^-6
when dividing powers with the same base, keep the base and subtract the exponents

5. use method of #3
math - Delilah, Wednesday, September 26, 2012 at 6:49pm
1. -9 = b
2. y^19 = c
3. w^-6 = d
5. 5^3 = c

Source:
Connections Academy - I totally did some of these problems when i was in 7th grade now i am in 8th- let me know f u need more help!

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