Let x represent the number of hours you read a book and y represent the total number of pages you have read. you already have read 70 pages and can be read as 30 pages per hour. write an equation relating x hours and y pages you read. then predict the total number hours you will read after 3 hours.

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%)