Roy bought a new battery-gasoline hybrid car. On a trip the car ran exclusively on its battery for the first 40[..]

The larger of two numbers is twice the smaller. If the sum of the numbers is 120.

Vida has $6.65 in nickels and dimes. If she has 99 coins, how many of each does she have?

House A is twice as old as the house B. Five years ago, house A was three times as old as house B. How old is each[..]

The zoo charges $7 for each adult admission and $5 for each child. The total bill for the 244 people from a school[..]

The speed of train A is 10 mph slower than the speed of train B. Train A travels 230 miles in the same time it takes[..]

How many milliliters of a(n) 60% acid solution should we add to 300 milliliters of a(n) 90% acid solution to get[..]

How many milliliters of a(n) 30% acid solution should we add to a(n) 60% acid solution to get 5,000 milliliters of[..]

Carter and Barbara are ticket-sellers at their class play, Carter handling student tickets that sell for $7.90 each[..]

Wanda divided $12,400 between a savings account and mutual fund. The savings account paid 4% interest and the mutual[..]