Chords!
please please please help me solve for x

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

In order for the function to be linear, what must m be and why? m = 22 because the rate of change is 1. m = 20 because the rate of change is 3. m = 22 because the rate of change is -1. m = 20 because the rate of change is -3.

What is the surface area of a cube with the volume of 729 ft?