85% on her test today. Her previous scores were 72%, 89%, and 90%. Calculate her new average (mean). (Just type in the numerical part of the answer,

The point a is at –2 and the point b is at 7. marissa would like to divide this line segment in a 4: 3 ratio, and she would like to use the formula x = (x2 – x1) + x1. what values should she substitute into the formula? a = a + b = x1 = x2 =