During the summer irwin worked 4 times as many days as mary. they worked a total of 75 days. how many days did each work

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

What is the value of the expression 9+n/3-6 when n = 12? 1. 5. 7. 12.

How many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.