1. A polygon has been drawn below with its sides extended to show both its interior and exterior angles. O 180(1-2) 650 o 1800. + TOS" 1109 360 360n. Which best expresses the sum of each interior angle and its corresponding exterior angle in a polygon with n sides? ​

Arandom high school question but a hard one

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1

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?