Sean and his sister, betty equally mow 8/9th the total area of a lawn. what fraction of the total area did each of them mow? (show ur work plz)

Geometry paper. i don't know how to do the rest. questions 5. 8. 9. and 10.

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

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)) =