(7x-4y+3z+4)+(5y+6z+1)-(4x+2z+3)

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

Which of the following expressions is equal to 2x^2+8

Write an expression that has three terms and simplifies to 4x - 7. identify the coefficient(s) and constant(s) in your expression