The quantities and y are proportional.

Find the constant of proportionality (r) in the equation y = rx.

R=

What is the least common multiple of 16 and 3?

(if f(x)=4x^2 and g(x)=x+1, find (f o g)(x)

Ahome improvement store rents it’s delivery truck for $19 for the first 75 minutes and $4.75 for each additional 1/4 hour. if a customer rented the truck at 11: 10 am and returned the truck at 1: 40 pm the same day, what would his rental cost be?