Two mechanics worked on a car. The first mechanic worked for 15 hours, and the second mechanic worked for 5 hours. Together they charged a total of $1250. What was the rate charged per hour by each mechanic if the sum of the two rates was $120 per hour?

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.

Answer this 30 points and brainliest!

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)