Is anyone able to help me on this?

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

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