The answer to your question is 20
Add all of the interior angles to 1260. Then you simplify for x. After that you plug in what you found for X in the E expression.
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Slope is -1/5
Y-intercept is 21
Equation is y=-1/5x+21
Yes it’s proportional :)
Answer:
1/4
Step-by-step explanation:
7/12 X 3/7 = 21/84 = 1/4