Choose the property of addition that justifies the equation. (5 + y) + 7 = 7 + (5 + y)
Choose one)
0 + a = a
(Choose one)
(5 + x) + 6 = 5 + (x + 6)
(Choose one)

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 =