Answer:
Keisha's score is 60
Jamaal's score is 75
Explanation:
Take the ratio of 4:5 and turn it into a fraction: 4/5
Then take the fraction and multiply each value by the difference in their scores.
So 4x15=60 and 5x15=75
This checks out as 60/75 comes out as 4/5, which is a 4:5 ratio and the difference between the two is 15