Stacy is 3 years younger than twice her sister’s age. Which equation can be used to determine her sister’s age if Stacy is 13 years old? A. 2x – 3 = 13 B. 3 – 2x = 13 C. 2(x – 3) = 13 D. 2(3 – x) = 13

What set does not contain -3 the set of all real numbers the set of all integers the set of all whole numbers the set of all rational numbers

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)) =

Isabel graphed the following system of equations. 2x – y = 6 y = -3x + 4 she came up with the solution (2,-2). what were the 3 steps she did to get that solution? (make sure they are in the correct order)