Achemist needs 9 liters of a 50% solution all she has is a 20% and 50% solution. how much of each does she need?

The circumference of a circle is 60 pi cm3what is the radius of the circle

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

Which statements describe the solutions to the inequality x< -20 check all that apply. there are infinite solutions. each solution is negative. each solution is positive. the solutions are both positive and negative. the solutions contain only integer values. the solutions contain rational number values.