Point D is the centroid of triangle ABC. AG is perpendicular to CB and GB = 8, AE = 5.75, AD = 4 and AC = AB. Find AB. Numbers on photo - 5.75 and 4, 8.

Can someone tell me if this is perpendicular? !

Every weekday, mr. jones bikes from his home to his job. sometimes he rides along two roads, the long route that is shown by the solid lines. other times, he takes the shortcut shown by the dashed line. how many fewer kilometers does mr. jones bike when he takes the shortcut instead of the long route?

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 =