Please help with question 3 it correlates with f

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 =

The area of each triangle is 7 square units. the surface area of the triangular prism is

An expression for the average of x 2x and 3y