The points on a section of an exam is given by the function f (x), where x is the number of questions answered correctly in that section? If
f (x)=20, then a test-taker receives 20
points for answering questions in the section correctly.
Plz, help!!

What is (28 + 7 + 6 + 3) x 1/2 show your work

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)) =

Can some one explain this i got sent this. is this a threat i’m scared