Hank is painting his grandfather's fence. he painted 40 linear feet in 85 minutes. he still has 360 linear feet to paint. his cousins, sam and alex, come to . sam paints twice as fast as hank, and alex paints half as fast as hank. find the constant of proportionality for the fence painting rate of hank, sam, and alex combined.

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)) =