Melissa wrote this expression to describe the number of pencils she used during the school year. 15-p which situation could be described by this expression? a. melissa knows she used 15 fewer pencils this year. she does not know how many she used last year. b. melissa knows she has 15 pencils left. she doesn't know how many she started with. c. melissa knows that she started with 15 pencils. she does not know how many pencils she used. d. melissa knows she has 15 pencils left. she used half of her pencils. plzz plzz plzz awnser fast 14 points

Idon’t understand! use slope intercept form to solve: through: (2,5) slope= undefined

What is the volume of a cone with a height of 6 cm in the radius of 2 cm

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)) =