(i think its easy idk lol) b) Anna, Brian and Cassidy go on a shopping trip. The number
of items that Anna buys is equal to the combined number of
items that Brian and Cassidy buys. The average item cost for
Anna was $5, Brian was $3, and Cassidy was $6, and the total
cost of the purchases was $120. If each item Anna bought was 4
oz, Brian was 3 oz, and Cassidy was 5 oz, the total ounces was
100 oz. How many items did each buy?

Define three variables and model the above with a system of
equations three equations. You do not have to solve the
system.

Is fgh ~ jkl? if so, identify the similarity postulate or theorem that applies.

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)) =

Which of the following constants can be added to x2 - 3x to form a perfect square trinomial?