Mary took out a student loan for $15,000 at 4% simple interest. how much interest will she pay after 10 years

problem:

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

f(5/2) = 10/3

i hope this !

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i'm pretty sure it would take 20 hours because it's half the men so you multiply the number of hours it takes by 2

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