*Please help asap taking a test!* (Thank you!) :D Max saw the following problem: 3 · (3 + 12 ÷ 3) - 4 The first thing he did was add 3 + 12 to get 15. What is Max's error?

-He should have multiplied 3 · 3 first
-He should have subtracted the 4 first
-He should have divided 12 ÷ 3 first
-He did the correct thing first

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.

Solve 3x-18=2y and 5x-6y=6 by elimination show work

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16