Tick the linear sequences. 1, 2, 4, 8, 16
1, 3, 5, 7, 9
0.8, 1, 1.2, 1.4, 1.6
1, 3, 6, 10, 15
20, 17, 14, 11,8
10, -20, 30, 40
60, 30, 15, 7.5
which ones the linear sequence out of these 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)) =