Supplementary angles add up to 180 degrees more than the other, you can formulate an equation 180=(100+x)+x80=2x so, x=40 the other angle is 100 degrees more. So, the angle lengths are 40 and 140 degrees.
The answer is B hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
= 16 + 49 - 3(11) - 4(10)
= 16 + 49 - 33 - 40
= -8
A. (8,4) because you can tell in the second pattern
This is your answer x=4, y=2