Math basic algebra 1 (1-8) unit 1: expressions, variables, and properties

If x = 12 and y = 3, what is the value of x - y 2? 81 6 3 18

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1

Use a transformation to solve the equation. w/4 = 8 can you also leave a detailed explanation on how this equation = 32