Help f(x) = 7 + 3x. g(x) = x

4 h(x) = 3
x

a) h(3x) = k
x
Find the value of k
b) Find the value of x when f(x) = g(2)
c) Find f
−1
(x)

David and alton are training for a race. they spend 35 minutes stretching and then go on a 5 mile practice run. david runs at a pace of 7 min/mile. alton runs at a pace of 8 min/mile. write an equation for each runner that shows the total length of their workout. then solve each equation showing your work