a basket is filled with cards, one for each letter of the alphabet and one for each digit 0-9. one card is chosen.​

X+y=-4 x-y=2 use elimination with adding and subtraction

Solving algebraic equations 2m+3=11

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%)