Can you guys help me out ps hurry im timed

What is the percent of increase for a population that changed from 438,000 to 561,000

Find the solution of this system of equation -7x+y=-20 9x-3y=36

Examine the two-step equation. − 7 4 + x 4 = 2 which property of operations allows you to add the same constant term to both sides? amultiplication property of equality bdivision property of equality caddition property of equality dsubtraction property of equality