Select all that apply
m=250-25w
m=250+25w
m=250w
m+25w=250
m-25w=250
250m+25w=10

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)