What is The linear function, f(x), that passes through the points (-1, 2) and (2, 4)

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

What are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?