3x(3x-2y)
you have to find a common factor between the two numbers. in this case it's three, so you just divide each number by three.
supplementary angles add up to 180°.
x = measure of such angle
x + 20 = measure of her sibling.
since "x" has 20 less than her sibling, then clearly her sibling has to have 20 more than "x".

Answer:
your answer will be 127.17 sq in
Step-by-step explanation:
hope it helps you
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