A. 91
Step-by-step explanation:
Supplementary angles are 2 angles that when added together, equal 180 degrees. 91+89=180
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-10i^2-4i
step-by-step explanation:
evaluate for p=2,q=5i
(2−4)(2+5i)i
=−10i2−4i
not sure but it may be b, as i said i'm not sure.