Solve & Justify: 7(x + 3) + 9 = 5(x - 2) - 3x

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents

To solve the system of equations below, pedro isolated the variable y in the first equation and then substituted it into the second equation. what was the resulting equation? { 5y=10x {x^2+y^2=36

The graph shows the distance kerri drives on a trip. what is kerri's speed?