Question 13 anyone that can help?

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!

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36