Direct variation

Can someone please tell me the answers to these

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

Write two subtraction equations that are equivalent to 5 + 12 = 17.

How many kilometers are equal to 5 miles? use 1 mile ≈ 1.61 kilometers. !