Calvin wants to earn an average grade of 90% in his algebra class. he already has the following scores on assignments: 90%,95%,85%,80%,97%.what mist he score on his next assingment to earn the average he wants?

Total of the 5 assignments = 90 + 95 + 85 + 80 + 97 = 447

If he wants an average of 90% for 6 assignments,
he needs a total score of 90 x 6 = 540

To achieve the average score of 90%, 
he needs to score 540 - 447 for his 6th assignment.

540 - 447 = 93% 


He must score 93% for the next assignment.