PLEASE HELP Trey and Viona have been mowing lawns to earn extra money. Their jobs earn them $52 per week. Ken worked for x amount of weeks and earned an extra of $20. Viona worked for y weeks. From the expressions below, select one that determines the total amount that Ken and Paul earned mowing lawns.

a
72x + 52y

b
52x + 20 + 52y

c
52x − 20 + 52y

d
52x + 72y

Write the system of equations represented by the matrix. 0 1 2 4 -2 3 6 9 1 0 1 3

10% of 1,900,000. show me how you got the answer

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?