How many solutions does f(x)=0 have?

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

How many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

The graph shows the charges for a health club in a month. make a function table for the input-output values. writes an equation that can be used to find the total charge y for the number of x classes