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3 years ago

Pregunta

Mathematics

1 answer:

Marina CMI [18]3 years ago

8 0

Answer:

∠B = 17°

Step-by-step explanation:

Los ángulos verticales son congruentes, por lo tanto

5x + 7 = x + 15 ( restar x de ambos lados )

4x + 7 = 15 ( resta 7 de ambos lados )

4x = 8 ( dividir ambos lados por 4 )

x = 2

Por lo tanto

∠B = 5x + 7 = (5 × 2) + 7 = 10 + 2 = 17°

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