Respuesta :
Answer:
7
Step-by-step explanation:
if he earned 15 points on two quizzes, and in one quiz he got 8,
15-8=7 for the second
He earned 7 points on second quiz because you would take away 8 from total amount of points (15) to get your answer which is 7. You can double check your work by adding 7 and 8