HELP!! The daily cost, in dollars, of renting a car can be
modeled by the equation C(m)= 22+.25m, where m
represents the number of miles the car is driven.
Given that C(m)= 64, find the value of m and
describe it's meaning in the context of the problem.

64 = 22 + .25m

Subtract 2w from both sides.

42 = .25m

Divide both sides by .25

168 = m. This means after renting the car, it was driven for 168 miles.

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!