How many liters of a 20%-alcohol solution must be mixed with 50 liters of a solution that is 80% alcohol to get a solution that is 30% alcohol

This is fractions casey shared a pizza with some friends. they each ate 1 third of the pizza. how many people shared the pizza

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny

Which expression is rational? 6. , square root two, square root 14, square root 49