Pllzz help Find a - 2b + 3c diminished by a - 2b - 3c + d.

The rumpart family is building a new room onto their house. the width of the new room will be 16 feet. the length of the room will be 4% greater than the width. write an expression to find the length of the new room. what will be the area of this new room?

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?