A chemist has 10 ml of a solution which contains a 30% concentration of acid. How many ml of pure acid (that is, 100% acid) must be added in order to increase the concentration to 50%?

Which graph represents y=^3 sqrt x+8-3 ?

Elena and her husband marc both drive to work. elena's car has a current mileage (total distance driven) of 15,000 and she drives 23,000 miles more each year. marc's car has a current mileage of 46,000 and he drives 9,000 miles more each year. will the mileages for the two cars ever be equal? explain.

Which three lengths could be the lengths of the sides of a triangle? 21 cm, 7 cm, 7 cm 9 cm, 15 cm, 22 cm 13 cm, 5 cm, 18 cm 8 cm, 23 cm, 11 cm