Justin says that if he adds any two negative integers the result will always be a negative integer, but if you subtract the same two negative integers, the result will always be a positive integer. do you agree with justin’s statement why or why not? need the answer asap

A) find the derivative of the inverse to f(x) = 3x + sint at x 6. b) (cale) find the derivative of the inverse to f(x)+3sin at x 6. if x +2y -34, ind he behaviar of the cure at 4,.3), c) a. increasing, concave up d. decreasing, concave down b. increasing, concave down e. decreasing, inflection point c. decreasing, concave up