Bob mowed (2x^2+5x-3) yards on Monday, (4x-7) yards on Tuesday, and (3x^2+10) yards on Wednesday how many yards did he mow in tree days?

If bob mow 14^2+12x-3 yards total for the entire week how many yards did he mow during the rest of the 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%)