Question

Harry took out a loan from the bank. The variable D models Harry's remaining debt (in dollars) t months after he took out the loan.

D = -200t + 9000

How much does Harry pay back each month?

$____

Answer 1

$200

Explanation:

Hope this helps!

Answer 2

Harry pays back 200t dollars every months

Explanation:

Given D = -200t + 9000, if D models Harry´s ramaining debt and "t" the months after he took the loan, it implies that 9000 is the total loan. Then

D = -200t + 9000 ⇒ D - 9000 = -200t ⇒ (D - 9000)/(-1) = 200t

⇒ 9000 - D = 200t . The difference 9000 - D, is the sum that he pays each month. So, first month he pays 200 dollars, the second 400 dollars, the third 600.... and so on.