, 09.04.2020 19:32 21ltilley

# Is it non proportional or proportional

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Mathematics, 21.06.2019 18:30
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)) =
Mathematics, 21.06.2019 19:30
Last month, a 770 g box of cereal was sold at a grocery store for \$3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at \$2.50. what is the percent change in the unit price?