angles a and b are supplementary because they form a straight line
First you have to figure that it sounds confusing but. What you have to do is that 171 is 189 LESS than from one place to another. So just do : 189-171= 18. And then you know 18.
7,14,21,28,35,42,49,56,63,70,77,84,91,98,105,112,119,126
18,36,54,72,90,108,126
first to get both will be the 126th person
1, 3, 5, 9, and 45 there is no multiple of 10 that is of 45
