The measure of line segment QR is 50. what is it in a mathematical symbolic representation?

What is the order of these fractions from least to greatest 2/3 7/10 5/8 65/100

If you answer 2+2 you will get over 80 points

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%)