3 years ago

X + y = 12

1 answer:

5 0

X+y=12
x+y+-y=12+-y
x+y+-y=12+-y
x=-y+12

x-y=10
x-y+y=10+y
x=y+10

z^2=-y^2+22
x=(square root) -y^2+22 or x=-(square root) -y^2+22

Hope this helps!

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5. IS E (none of these)

Because I got:

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