Find m(x) = f(x) * h(x)

Values - f(x) = -3x + 6; g(x) = 7x -5; h(x) = -2

Martha is training for a duathlon, which includes biking and running. she knows that yesterday she covered a total distance of over 55.5 miles in more than than 4.5 hours of training. martha runs at a speed of 6 mph and bikes at a rate of 15.5 mph.