Select all the true statements. A. 2 + (−2) is equal to zero.

B. (−3) + (−4) is positive.

C. −2 − (− 2) is positive.

D. 5 + (−2) is positive .

E. 7 − (−10) is negative.

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

Identify which functions are linear or non-linear. a. f(x) = x2 + 1 b. f(x) = 2x + 5 c. f(x) = x 2 + 3 d. f(x) = 3 x + 7 e. f(x) = 4x + 10 2 - 5

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?