I am supposed to solve this problem using the Gauss elimination method: 2x+y+2z=5
3x+2z=2
-4x+6y-z=3
I did the problem, but got -5/7 for z, and the answers are all supposed to be integers. Any idea where I went wrong?

Find parametric equations for the line tangent to the curve of intersection of the surfaces at the given point. surfaces: xsquared2plus+2yplus+2zequals=1212 yequals=33 point: left parenthesis 1 comma 3 comma five halves right parenthesis

Factor the following expression. 27y3 – 343 a. (3y + 7)(9y2 + 2ly + 49) b. (3y – 7)(9y2 + 2ly + 49) c. (3y – 7)(932 – 217 + 49) d. (3y + 7)(92 – 2ly + 49)

Which function has the domain x> -11