What property is illustrated by this problem 45*0=0

Given abcd ac=38 and ae=3x+4 find the value of x

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m

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 =