How do I solve the system of equations using substitution for 1. y = 3x + 4 y = 4x + 11
2. y = -2x - 6 y = -4x -10
3. y = 3x + 7 y = 3x - 3

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