Complementary and Supplementary Angles - Example 2

[ana2bananas]

Thanks! By the way, what kind of Sharpie marker are you using? I see that it never goes through the paper!!!!!

[krakerstaker]

You should not have rounded until you achieved your final result. If you used x = 43/3 in the final equation y = 90 - 6x instead of 14.3, you end up with 4 exactly. You induced an error of 2 tenths because you rounded before you finished.