Aparka that sold for 65 dollars is marked up to 70.20 what is the percent of markup

It is marked up 8%

65*.08=5.20

5.20+65=70.20

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 !