Answer:
1/7^2
Step-by-step explanation:
The applicable rules of exponents are ...
(a^b)(a^c) = a^(b+c)
a^-b = 1/a^b
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Then your expression simplifies to ...

7x+y-9=0
move constant to the left by adding its opposite to both sides. the sum of the two =0
Answer:
(-2,-2) and (-7,1)
Step-by-step explanation:
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