Plot two points to represent the temperatures -0.9 F and -1.2 F on the number line.

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 expression is equivalent to 2x^2+7x+4?

Solve 2x+y=3 x+y=5 in substitution method