Write the linear system in matrix form. assume x = x y z . dx dt = −4x + 2y − 9z dy dt = 8x − y dz dt = 10x + 2y + 4z

On an airplane there are two seats on the left side and three seats on the right side there are 90 seats o the right side of the plane

Given f(x) = 2x^2- 5x+1, determine the function value f(2). do not f(x) = in your answer

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.