To solve your question, you add all of the measurements together, set them equal to 180, solve for x, and plug x back in for whichever angle they are asking for; in this case, they want angle R
7x + 12x + 20 + 20x - 35 = 180
39x - 15 = 180
39x = 180 + 15
39x = 195
x = 5
Angle R = 12x + 20
12(5) + 20
60 + 20
80
Option C is your answer.
Monthly payment - $7,200
Down payment - $1,000
Residual value - $9,000
Total cost of the lease - 17,200
C as when they put more hours into the social media they will study less and less which leads to less test scores
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X stands for the score of her first test
Y stands for the score of her second test