The mean for a set of data is 10. Which of the following is the set of data with a mean of 10?
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Complementary angles signify that the two angles will add up to 90 degrees If the sum of your complementary angles exceeds the difference by 72, the equation will look like 
, where x and y are the two different angles. You can cancel the x's out because they are on both sides, and you are left with the single variable equation, [text]y=-y+72[/tex], and when you solve for y, you find that y is 36 degrees, which means that x is 54 degrees. Since you want the smaller angle, 36 degrees would be correct.