Three friends each have some ribbon. Carol has 90 inches of ribbon, Tino has 4.5 Feet of ribbon, and Baxter has 1.5 yard of ribbon. Express the total length of ribbon the three friends have in inches, feet, and yards.

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)) =

Math i have no idea how to do a and b

I’m not good at math can i have ? ?