Which equation is equivalent to x + 3y – z = 3?

3x + 6y – 3z = 6

4x + 12y – 4z = 12

2x + 4y – 2z = 8

2x + 3y – 4z = 12

Compare the subtraction problems 6/8 - 5/8 = 1/8 and 6/9 - 7/9 = 1/9 why is the answer to the first problem positive and the answer to the second problem negative

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

Askateboard ramp is in the shape of a right triangle what is the height of the ramp