Suppose that y varies directly with x and y = 10 when x = 20. What is y
when x = 15?
Be sure to simplify your answer.

To which sets of numbers does -12 belong? choose all answers that are correct. a) natural numbers b) integers c) real numbers d) irrational numbers

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.

What is the measure of one interior angle of a pentagon