(c) A room is 12m long, 10m broad and 4.5m high. It contains a door of size Im x 3m and
two windows of size 2m x 1.5m each. Find the area of the four walls of the room
excluding the door and windows.

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

Alana has 12.5 cups of flour with which she is baking four loaves of raisin bread and one large pretzel. the pretzel requires 2.5 cups of flour to make. how much flour is in each loaf of raisin bread? explain the steps to follow to get the answer.

How do you solving the solution of each system using elimination?