Prove that 3: 8 is equivalent to 12: 32

An advertising firm has an old computer that can prepare a whole mailing in 6 hours. with the of newer model the job is complete in 2 hours. how long would it take the newer model to do the job alone?

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent ?

Find the solution(s) to the system of equations. select all that apply y=x^2-1 y=2x-2