Simplify the expression (7x² - 3x) + (11x² - x - 7) A. 18x² + 2x + 7 B. 4x² - 4x - 7 C. 18x² - 2x - 7 D. 18x² - 4x - 7
2 answers:
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Answer:
b. A year and a half
Step-by-step explanation:
First, we can find the total cost
Next, we can divide by 50 in order to find out how many months it will take for the panel to pay for itself.
months
This is very close to 36 months, which is <u>A year and a half</u>.