Question

1: Bellringer

Heather would like to have an average of 90 in her science class.
There are four assignments with the following grades:
82, 95, 88, 86
What grade will Heather need to make on the last assignment to meet her goal?
O 98
O 99
O 87
O 88

Answer 1

99

Explanation:

Grades obtained:

• 82, 95, 88, 86

Target grade:

• 90

Required grade = x, then average is:

• (x+82+95+88+86)/5 = 90
• x + 351 = 90*5
• x = 450 - 351
• x = 99