2 answers:
Two angles are called supplementary if they add up to 180 degrees.
(2x+4) + (3x+1) = 180
5x + 5 = 180
5x = 175
x = 35
To find the measure you need to go back and substitute the new found value into the x variables.
Measure angle one: 2(35) + 4 = 74
Measure angle two: 3(35) + 1 = 106
So, your answer is B. 74 and 106
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