Please help me solve this quadratic equation

Ben bowled 124 and 188 in his first two games. what must he bowl in his third game to have an average of at least 160?

Write a corresponding real world problem to represent 2x - 125=400

The highest point on earth is the peak of mount everest if you climb to the top you would be approximately 29,035 feet above sea level at remembering that amount is 5280 feet percentage of the height of the mountain would you have to climb to reach a point 2 miles above sea level