Answer:

Step-by-step explanation:
<u>Step 1: Set x to -1 and solve</u>
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Answer: 
Answer:
the angle which is equal to its supplement is 90 degree
The answer to this question should be 114
90 = k*15
constant of proportionality = 80 / 15 = 6 Answer
One can solve this by first using order of operations, and then combining like terms.
First is parenthesis
9x + 2x(9) - 2(9x)
Now we do the multiplication
9x + 18x - 18x
Now we combine like terms
9x