Your friend needs to gain weight to wrestle in a heavier weight class. his goal is to gain 2 pounds per week. after 3 weeks, his weight is up to 158 pounds. if the rate of weight gain stays the same, which equation shows his weight at the end of each week?

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%)