I hope this helps you
-3.1 -3. (-8m) -3. (-2n)
-3+24m+6n
24m+6n-3
Left triangle has a 90 degree angle so 90 plus 35 equals 125. 180 is the total angles in a triangle so subtract to get A. A = 55. The angle of A also helps for B. 55 is part of 180 (a strait line) so that means B is 125. A and C are the same because the is is 2 strait lines intersecting. C is 55. Now for the right triangle. 55 + 70 is 125. do the same thing as we did for A and you should get 55 for D.
Hope this helps!
If you wanted to figure out how much Jonathan would get in multiple weeks then multiply 18 by the number of weeks to get the total amount of money Jonathan receives for allowance during the weeks.