Your answer would end up being 1.
6^2-7(8+6-3^2) = 1
"If 5x+7=-13, then x=-4"
The contrapositive is the inverse and converse of a conditional statement. So, the contrapositive of this statement would be:
"If x does not equal -4, then 5x+7 does not equal -13."
8-the formula to find an exterior angle of a polygon is:
360/n
(n is the number of sides of the polygon)
so the answer is 40
9 - the formula to find an interior angle of polygon is:
so the answer is 135
good luck