My question is in the picture I tried to multiply -7 on both sides and got -147 I don't know if it's correct or if it's the righ
t way to do it.
2 answers:
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Answer:
inches
Step-by-step explanation:
a^2+b^2=c^2
10^2+20^2=c^2
100+400=c^2
c^2=500