40 POINTS TO WHO EVER answers first Which system of equations is equivalent to the following system?

4x + y = 4
2x + 7y = 28

A. 4x + y = 4
−2x − 7y = 28

B. 4x + y = 4
−8x − 28y = 112

C.−28x − 7y = −28
2x + 7y = 28

D. −8x − 2y = 8
2x + 7y = 28

Someone answer this asap rn for ! a discount store’s prices are 25% lower than department store prices. the function c(x) = 0.75x can be used to determine the cost c, in dollars, of an item, where x is the department store price, in dollars. if the item has not sold in one month, the discount store takes an additional 20% off the discounted price and an additional $5 off the total purchase. the function d(y) = 0.80y - 5 can be used to find d, the cost, in dollars, of an item that has not been sold for a month, where y is the discount store price, in dollars. create a function d(c(x)) that represents the final price of an item when a costumer buys an item that has been in the discount store for a month. d(c(x)) =

At 6 1/2 cents per pound of string beans how much does 7 pounds 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?