Let f(x, y) = 2xy − 3xy + y + 1. Find the derivative of f with respect to y.

Its due ! write an equation in which the quadratic expression 2x^2-2x 12 equals 0. show the expression in factored form and explain what your solutions mean for the equation. show your work.

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

Factor and solve to find roots x squared -x - 90 =0