Question

Please help, I’m being timer

Answer 1

Answer:

CB=18

And the measure of angle BDA is 21 degrees

Step-by-step explanation:

Answer 2

Answer: ∠BDA = 21; CB = 30

have:

sin ∠BDC = $\frac{4x+6}{BD}$

sin ∠ADB = $\frac{7x-12}{BD}$

because ∠BDC = ∠ADB => sin ∠BDC = sin ∠ADB

=> $\frac{4x+6}{BD}=\frac{7x-12}{BD}$

=> 4x + 6 = 7x -12

<=> 3x = 18

<=> x = 6 => CB = 4.6 + 6 = 30

Step-by-step explanation: