Sisters Helen and Anne live 332 miles apart. For Thanksgiving, they met at their other sister's house
partway between their homes. Helen drove 3.2 hours and Anne drove 2.8 hours. Helen's average speed
was four miles per hour faster than Anne's. Find Helen's average speed and Anne's average speed.

There's something WRONG with one of the responses.

Let Helen’s average speed be S
Then Anne’s average speed = S - 4
Helen’s distance covered: 3.2S
Anne’s distance covered: 2.8(S - 4) = 2.8S - 11.2
Since together, they both covered a total of 332 miles, we get the following DISTANCE
equation: 3.2S + 2.8S - 11.2 = 332
                          6S = 343.2
     Helen’s speed, or 

             Anne’s speed = 57.2 - 4 = 53.2 mph