Derek has $20 to spend on used books. Hardcover books cost $5 each and paperbacks cost $2 each.

Part A
Complete the equation which determines the number x of hardcover books and the number y of paperback books he can buy.

x + y =

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)) =

What are the coordinates of the point that is 1/3 of the way from a to b? a (2,-3) b (2,6)

Measure of angles 31 (x+4) (3x+9) me