Question:
Un = 3n-5

There is an example of the same type of exercise in the pic.

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%)

Brad earns $12.75/hr and works 40 hours a week. what is his gross annual income?

Drawing it out would be best can you me