X+2y-z = 9
-2x+y+z= 1
2x-y+2z= -5

Can someone check my answer? you

Explain why the function is discontinuous at the given number a. (select all that apply.) f(x) = 1 x + 1 a = −1 f(−1) is undefined. lim x→−1+ f(x) and lim x→−1− f(x) exist, but are not equal. lim x→−1 f(x) does not exist. f(−1) and lim x→−1 f(x) exist, but are not equal. none of the above

How many solutions does the nonlinear system of equations graphed bellow have?