What is the name of the ray that is opposite FH

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!

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

Which of the following expressions is equal to 2x^2+8