If DE = 7x + 3 and EF = 9x - 19,
then EF = ?

Mary used 1/7 of a spool of ribbon to complete 4 projects. she used the same amount of ribbon on each project. how much ribbon did she use on each project?

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?

Which type of graph would allow us to quickly see how many students between 100 and 200 students were treated?