8 fewer than the sum of 14 and a number

Is a positive integer raised to a negative power always positive

Which expression gives you the distance between the points (5,1)and(9,-6)

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%)