1)
Which graph represents a linear function?
A) A
B) B
C) C
D) D

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)) =

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)