ijohnh14 ijohnh14

07-03-2019
Mathematics

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Please help me ASAP!!!

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Respuesta :

lastbenchstudent lastbenchstudent

16-03-2019

by triangle angle addition law

a + b + c = 180

3x +1 + 2x-1 +40 = 180

5x +40 = 180

5x = 180 - 40 = 140

x = 140/5 = 28

so

b = 2x -1 = 2×28-1= 56-1 = 55

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