Solve each problem that has a solution. if a problem has no solution, explain why
1. lee and jessie swam towards each other from opposite sides of a lake that is 3.9
km wide. they began swimming a 2: 00p. m. and met a 2: 30 p. m. lee's speed was
1 km/h greater than jessies speed . find their speeds.
2. a rectangle is 4 cm longer than it is wide . if the length and width are both decreased by 2cm , the area is decreased by 24 cm^2. find the dimensions of the original rectangle .
3. roy says he has more nickels than dimes . if he has $5.20, how many of each coin does he have ?