Evaluate the expressions. show all work : )
a. y ÷ 2 + x; if x = 1, and y = 2
b. z(x + y); use x = 6, y = 8, and z = 6
c. 6q + m − m; use m = 8, and q = 3

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 =