Simplify -7x + 6y - 2x + 7x - 9x

-11 + 6y

Explanation:

First you need to group like terms.

-7x - 2x + 7x - 9x + 6y

Then you need to combine the similar elements.

-7x - 2x + 7x - 9x = -11x

Then the only two numbers you have left are -11x and 6y.

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The answer would be: 6y - 11x

answer: it's d

step-by-step explanation:

m∠5 + m∠3 = m∠1   is true.

m∠5 + m∠6 = 180 is true

m∠2 +m∠3 = m∠6   is true

m∠2 +m∠3 +m∠5 = 180   is true