Question

Evaluate the expression for the given values of the variable x - y^3; x = -7, y = 3

Answer 1

So, you know that x=-7 and y=3, and you have the expression x - y^3, and when the question says "evaluate"(in this context) it means simplify into the smallest amount of terms possible. So you substitute what x is equal to into the expression and the same for y. so you get (-7) - (3)^3. Then you use pemdas to simplify.