What 2 numbers multiply to make -30 and combine to make -7?

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.

Find the solution of system of equation y= x-4 y=4x+2

Graph the linear function using the slooe and y intercept