Simplify the following expression and justify each step in your simplification. 5(7-x)+6x(3x+4) i know the answer is 18x^2+19x+35 but i need the process of getting there

Find the cosine function that is represented in the graph.

Does the function satisfy the hypotheses of the mean value theorem on the given interval? f(x) = 4x^2 + 3x + 4, [−1, 1] no, f is continuous on [−1, 1] but not differentiable on (−1, 1). no, f is not continuous on [−1, 1]. yes, f is continuous on [−1, 1] and differentiable on (−1, 1) since polynomials are continuous and differentiable on . there is not enough information to verify if this function satisfies the mean value theorem. yes, it does not matter if f is continuous or differentiable; every function satisfies the mean value theorem.

The difference between two numbers is one. three times the larger number minus two times the smaller number is 9. what are the two numbers