Eighteen less than a number is 44

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!

How do you use the elimination method for this question? explain, because i really want to understand!

What is the value of the expression i 0 × i 1 × i 2 × i 3 × i 4? 1 –1 i –i