The following system of equation is given -7x + 7y=7
23 – 2y = -18
Choose the correct solution for the system,
no solution
infinitely many
solutions
12,7)
(2,7)

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%)