Which expression shows the prime factorization of 20? a. 2 to the second power times 5, c. 4 times 5, b. 2 times 10, d. 4 to the second power times 5

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.