Write an equation and solve each problem. seven less four times a number equals 13 , what is the number?​

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

What is the value of x in the diagram below?

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?