Question

Kevin's history grade will be determined by the average of 4 tests. he received a 76, an 85, and a 74 on the first 3 tests. he needs to get a average of at least 80 to receive a B. which inequality can be used to find g, the minimum grade Kevin must make on the fourth test to receive a B in history?

A. 76+85+74+g/4_>80
B. 76+85+74-g/3_>80
C.76+85+74-g/4_>80
D. 76+85+75+g/3_>80

Answer 1

A. 76+85+74+g/4 >=80

Explanation:

1. Add 76, 54, 74, and g together

2. divide by 4 because there are 4 quantities

To find the average (mean): values/#of data values

3. Then this fraction is greater than or equal to 80 because he needs AT LEAST a b/80 average.

Answer 2

The answer is B.
Hope this helps!!!