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03-11-2017
Mathematics

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What is the value of x ?

In ∆ABC, m∠A=(3x + 7)°, m∠B = (2x − 8)°, and m∠C=(5 − x)°

A.29
B.40
C.46
D.44

Respuesta :

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03-11-2017

so,

1) 3x+7+2x-8+5-x=180
2) 4x+4=180
3) 4x=176
4) x=44

Answer is D

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