Andrea is shopping for items for her pet sitting business because the store is having a sale where everything in the store is 5% off. andrea buys a cat carrier for $39.99 and a cat tower for $19.99. she has a coupon for an additional 15% off on the cat tower. before tax, andrea estimates that her total, after discounts, will be about $54. determine if andrea has estimated correctly.

Each of the walls of a room with square dimensions has been built with two pieces of sheetrock, a smaller one and a larger one. the length of all the smaller ones is the same and is stored in the variable small. similarly, the length of all the larger ones is the same and is stored in the variable large. write a single expression whose value is the total area of this room. do not use any method invocations.

Yesterday i ran 5 miles. today, i ran 3.7 miles. did my percent increase, decrease or is it a percent error? plz i need

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?