Melanie has 137 dollars to spend on 17 books. after buying them she had 11 dollars. how much did each book cost?

Melanie has 137 dollars in total.

Let each book cost=x

No of books=17

So total cost of 17 books=17x

After buying books Melanie left with 11 dollars

According to question the required equation will be=

17x+11=137

17x=137-11=126

x=8

i.e Price of each book is 8 dollars. (Answer)

Each book cost 12.4$

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 !