2 years ago

○a 25°○b 31°○c 23°○d 59°

Mathematics

2 answers:

Kamila [148]2 years ago

7 0

Answer:

Step-by-step explanation:

∠ BDC + ∠ ADC = ∠ ADB , substitute values

- 6x + 53 - 9x + 22 = 90

- 15x + 75 = 90 ( subtract 75 from both sides )

- 15x = 15 ( divide both sides by - 15 )

x = - 1

Then

∠ ADC = - 9x + 22 = - 9(- 1) + 22 = 9 + 22 = 31° → b

Vaselesa [24]2 years ago

5 0

Answer:

i think it would be B

Step-by-step explanation:

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○a 25°○b 31°○c 23°○d 59°​

○a 25°○b 31°○c 23°○d 59°