Which expression is equivalent to 3x - 5

Awork system has five stations that have process times of 5, 9, 4, 9, and 8. what is the throughput time of the system?

Neveah and clint are baking muffins for the bake sale. they need to bake 30 muffins for their display case. clint has baked 4 so far, and neveah has baked 7. how many muffins (m) do they have left to bake? show your work!

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area