What is
7x - 4 = 21 ?

Beth makes batches of bluberry muffins and banna muffins. each batchis 6 muffins. she makes 2.5 batches of bluberry muffins. how many batches of bananna muffins should beth make if she wants to have a total of 60 muffins?

8. kelly wants to buy a magazine that is $25. later the magazine was marked up an additional 20%. what is the new price?

What is the gcf of 20c^3-5c^4+30c^6