The perimeter of a rectangle is 90 feet. the length is 27 feet. what is the width of the rectangle? feet:

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 these tables represents a non-linear function?

Ineed me i stuck and i don’t want to get it wrong