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.

Three times the difference of federico’s age, and 4, increased by 7, is greater than 37. what are possible values of federico’s age?

If jaime wants to find 60% of 320, which table should he use?

Using pert, adam munson was able to determine that the expected project completion time for the construction of a pleasure yacht is 21 months, and the project variance is 4. a) what is the probability that the project will be completed in 17 months? b) what is the probability that the project will be completed in 20 months? c) what is the probability that the project will be completed in 23 months? d) what is the probability that the project will be completed in 25 months? e) what is the due date that yields a 95% chance of completion?