Suppose a, b, and x are n times nn×n matrices with a, x, and a - ax invertible, and suppose that (a - ax)^-1 = x^-1 b. complete parts (a) and (b) below. a) explain why b is invertible. b) solve equation (3) for x. if matrix needs to be inverted, explain why that matrix is invertible.

Suppose a pendulum is l meters long. the time,t,in seconds that it tales to swing back and forth once is given by t=2.01

Suppose that the price p, in dollars, and the number of sales, x, of a certain item follow the equation 4 p plus 4 x plus 2 pxequals56. suppose also that p and x are both functions of time, measured in days. find the rate at which x is changing when xequals2, pequals6, and startfraction dp over dt endfraction equals1.5.

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota