3 years ago

Please help

Mathematics

2 answers:

CaHeK987 [17]3 years ago

7 0

Answer:

A. 50

Step-by-step explanation:

B and C are supplementary angles as adjacent angles of a parallelogram, which means they sum to 180°.

m∠B + m∠C = 180°
3x - 9 + 39 = 180
3x + 30 = 180
3x = 150
x = 50

Correct choice is A

lesya692 [45]3 years ago

3 0

$Hello$ $There!$

ANSWER:

$44.$

If you need a explanation, just comment below! :)

$AnimeVines$

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