Respuesta :

jaslew04
ANSWER

X = -9

EXPLANATION: you subtract 180 - 70 giving you 110

Equation set up: x + 49 + x + 79 = 110
NgShiYin

Answer:

m∠A = 40°

m∠B = 70°

Step-by-step explanation:

The sum of angles in a triangle is 180°.

x + 49 + x + 79 + 70 = 180

2x + 198 = 180

2x = 180 - 198

    = -18

x = -18 ÷ 2

x = -9

m∠A = x + 49

        = (-9) + 49

m∠A = 40°

m∠B = x + 79

        = (-9) + 79

m∠B = 70°

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