Ming plays video games online. when he signed up with the game site, ming got 200 points. ming earns 20 more points for each hour that he plays. how many hours does ming have to play to get to 500 points?

First, substract the total of points with the points he got from signing up, to find the points he got after playing
points after playing = 500 - 200
points after playing = 300

Second, divide the points after playing by the number of points per hour, to find how long Ming played
time = 300/20
time = 15

Ming played for 15 hours

11 mintues is the naswer