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Which inequality statement describes the two numbers on a number line? "? 7 and a number 5 units to the right of ? 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%)

Use the equation and type the ordered-pairs. y = 2 ^x