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Bezzdna [24]
3 years ago
7

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

Mathematics
1 answer:
Marina CMI [18]3 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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