While he was playing a video game, Zach would lose 7 points every time his character’s hat was blown off. In one game, he lost 9 hats this way, but earned 25 points by completing a task. Zach’s score can be represented by this expression: -7(9) + 25. Which integer represents the change in Zach’s score? please help me

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?