What polynomial should be subtracted from the polynomial y2–5y+1 to get the difference equal to 5

Prove that quadrilateral is a rhombus.

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?

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122