urgent math
1. Simplify the expression 7^9/7^3
a.7^3***
b.7^6
c.7^12
d.1^6
2. Simplify the expression z^8/z^12
a.z^20
b.z^4
c.1/z^4
d.1/z^4
3. Simplify the expression (3^4)/(3^4
a.(3)^1
b.0
c.1
d.(3)^8
4.Which expressions can be rewritten as 1 over the base raised to a positive exponent? 2
a.b^2/b^4
b.w^5/w^3
c.5^3/5^5
d.4^7/4^7

2.c?
3.c
4.a and d?posted by Connexus

#1. 7^(93) = 7^6
NOT 7^(9/3) = 7^3
subtract exponents when dividing numbers. What you have is
7*7*7*7*7*7*7*7*7

7*7*7
only three of the 7's cancel
#2
z^8/z^12 = 1/z^4 = z^4
So, D, not C
#3 ok
#4 not sure what that trailing 2 means, but
a.b^2/b^4 = (1/b^2)/b^4 = 1/b^6
b.w^5/w^3 = w^5 * w^3 = w^8
c.5^3/5^5 = 1/5^2
d.4^7/4^7 = 4^0 = 1
Looks like A and C both work.posted by Steve

Thank you so much steve
posted by Connexus

could you help me with a few more questions?
posted by Connexus

1. x^9/x^2
a.x^11
b.x^7***
c.7
d.x^5
2.h^14/h^5
a.h^9***
b.1/h^9
c.h^19
d.h^9
3.4^4/4^6
a.16
b.16
c.1/16***
d.1/16
4.5^0
a.0***
b.5
c.1
d.5
5.7^4/7^2_____49
a.<***
b.>
c.=
d. none of the above
6.2r(8r+5)
a.16r^2+5
b.16r^2+10***
c.16r^210r
d.16r^210
7.2a(a^2+4a)
a.2a^2+6a^2
b.2a^3+8a^2
c.2a+6a
d.2a^3+6a^2***
8.(3y)(3y2)
a.9y^26
b.9y^2+5y
c.9y^2+1***
d.9y^26yposted by Connexus

100% thank you Steve
posted by kneegrow

1.B
2.D
3.C
4.A and C
100%posted by Martha

^^ THANK YOU SO MUCH MARTHA I GOT 100%
posted by aye

steve is right i got a 100%
1. B
2. D
3. C
4. A and Cposted by Zurai
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