1. What do you actually combine when adding functions together? *

If 30 lb of rice and 30 lb of potatoes cost ? $27.60? , and 20 lb of rice and 12 lb of potatoes cost ? $15.04? , how much will 10 lb of rice and 50 lb of potatoes? cost?

When is g(x) = 0 for the function g(x) = 5.23x + 4?

What is the equation of a line that passes through points (0, 4) and (-4,-8)?