Question

The two angles measuring (30-a) mad and (125+2a) are supplementary to each other .Find the valie of a​

Answer 1

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Step-by-step explanation:

$1st \: angle = (30 - a) \\ 2nd \: angle = (125 + 2a) \\ angle \: 1 + angle \: 2 = 180 \\ = (30 - a) + (125 + 2a) \\ = 30 - a + 125 + 2a = 180 \\ = 155 + a = 180 \\ = a = 180 - 155 \\ = a = 25 \\ \\ 1st \: angle = 30 - a \\ = 30 - 25 \\ = 5degree \\ 2nd \: angle = 125 + 2a \\ = 125 + 2 \times 25 \\ = 125 + 50 \\ = 175degree$

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Answer 2

Answer:

4 + 5 = 9...

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