Answer:
<h2>
x
- x - 6</h2><h2 />
Step-by-step explanation:

Multiply each term in the first parentheses by each term in the second parentheses ( FOIL)

Calculate the product

Collect like terms

Hope this helps..
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Answer:
A
Step-by-step explanation:
Answer:
C.
make me brainlest if you copy okay
Answer:
90deg
Step-by-step explanation:
If the angles are supplementary, that means mA + mB = 180*
we know that
mA = (2x + 8)deg
mB = (2x + 8)deg = mA
mA + mB = 180deg
mB + mB = 2mB = 180deg
mB = 90deg
Note, that we did not need to compute x even, because the angles were the same.