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

You and a friend went to the movies.you spent half your money on tickets. then you spent 1/4 of the money on popcorn, $2 on candy, and $3 on a soda. if you have $1 left, hiw much money did u take to the movies?

Which of the following represents the factorization of the trinomial below? x^2+7x-30

How do you find the distance of each number from the mean