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2 years ago

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A and B are complementary angles. If A = (x + 9) and m B = (7x – 15)° then find the measure of B.

1 answer:

Marina CMI [18]2 years ago

3 0

Answer:

$coplementary \: angles \: = 90° \\ (x + 9)° + (7x - 15)° = 90° \\ (8x - 6)° = 90° \\ 8x = 90 + 6 \\ 8x = 96° \\ x = 12\\ angle \: B. = ((7 \times 12)- 15) \\ = 69°$

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$\bold{\huge{\pink{\underline{ Solution }}}}$

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