2) Which sequence is a geometric sequence with a common ratio of 2? O A 5,3,1,-1,...
O B5,7,9,11,...
O C 5, 10, 20, 40,...
OD 5, 15, 45, 135, ...
Answer plz hurry

Add or subtract polynomial : –12qr? +13rq?

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

Someone answer asap 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)) =