How can a number line help you see how to round to the nearest 10 and 100

The tangent of an angle is not which of the following? a) ratiob) proportionc) fractiond) opposite over adjacent

Choose the point slope form of the equation below that represents the like that passes through the points (-6,4) and (2, 0)

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%)