This is what the letters in PEMDAS stand for.
What is parentheses, exponents, multiplication, division, addition, subtraction?
2(1 - 9a) - 9a
2 - 18a - 9a
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What are supplementary angles?
Two adjacent angles whose measurements add up to 180 degrees
7 - 24 / 8 x 4 + 6
1
8s - 7(s + 7)
8s - 7s + 49
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What are complementary angles?
Two adjacent angles whose measurements add up to 90 degrees
6 x 4 / 12 + 72 / 8 - 9
2
-4(-20 + 7k) + 6(-9 - k)
80 - 28k - 54 - 6k
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If you have two complementary angles and one angle is 45 degrees, what is the measurement of the other angle?
45 degrees
(17 - 6 / 2) + 4 x 3
26
4(1 + 7k) - 7(k + 6)
4 + 28K - 7k - 42
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If you have two supplementary angles and one angle is 70 degrees, what is the measurement of the second angle?
110 degrees
-2(1 x 4 - 2 / 2) + (6 + 2 - 3)
-1
-10(n - 12) - 12(-5n - 3)
NEXT STEP?
If you have two complementary angles and one is 15 degrees, what is the measurement of the second angle?
75 degree