GUYS I FR NEED HELP SO PLEASE GO ANSWER MY GEO QUESTIONS TY BYE

Which expression is equivalent to 2x^2+2x-4/2x^2-4x+2

Answer for 10 points show work you guys in advanced < 3

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%)