SOLUTION: David and his sister are 24 miles apart. They start biking toward one another. David rides at a rate of 8 mph and his sister rides at a rate of 12 miles per hour. How long befo

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: David and his sister are 24 miles apart. They start biking toward one another. David rides at a rate of 8 mph and his sister rides at a rate of 12 miles per hour. How long befo      Log On