Find perimeter of this rectangle

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?

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?