Emma went to the beauty salon and her bill was $72.60 before tax. a) The sales tax rate was 8%. How much did Emma pay in tax? b) Emma added a 20% tip on the amount before tax was added. How much money did Emma leave as a tip? c) How much did Emma pay in total at the beauty salon?

Solve the system by the elimination method. 3x - 2y - 7 = 0 5x + y - 3 = 0 to eliminate y, the lcm is 2. which of the following is the resulting equations? 1.3x - 2y - 7 = 0 5x + y - 3 = 0 2.3x - 2y - 7 = 0 -10x - 2y + 6 = 0 3.3x - 2y - 7 = 0 10x + 2y - 6 = 0

The physical fitness of an athlete is often measured by how much oxygen the athlete takes in (which is recorded in milliliters per kilogram, ml/kg). the mean maximum oxygen uptake for elite athletes has been found to be 60 with a standard deviation of 7.2. assume that the distribution is approximately normal.

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