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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.​

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

User Gokul Kulkarni
by
8.2k points

1 Answer

6 votes

Answer:


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

User Art Swri
by
8.8k points
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