I’m completely lost and need help!

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

The longer leg of a 30° 60° 90° triangle is 16 times square root of three how long is a shorter leg

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5