Which of the diagrams below represents the contrapositive of the statement
"if it is a square, then it is a quadrilateral"?
not quadrilateral
not square
not square
not
quadrilateral
figure a
figure b
o
a. figure a
o
b. figure b

Umm.. just started this 2day and its not on my notes(p′︵‵。)

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?

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?