Your answer is 20
As isosceles triangle has two angles similar
And sum of all angles is 180,
so
80 + 80 = 160
and
180 - 160 is
20
So ur answer is 20
♥
Answer:
D. -3z+2
Step-by-step explanation:
Steps:
Remove parentheses: (a) = a
= 5z+9-(8z+7)
....
Simplify
5z+9-8z-7: -3z+2
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