2. Which of the following equations is the rectangular form of the parametric equation r=1-5. v= 41 +7? A. y = 4x+13 B. y = 4x+27 C. y = 4x-13 D. y = 4x-27 ​

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%)