Okay so this is just step by step hope this helps you.
4x-30=180
180-30
4x=150
150/4
37.5
x=37.5
6.4
1/2 * 5.4 * 7.1 sin60
Mark brainliest please
<span>g^2 – 4g – 21 = (g – 7)(g +3 )
hope it helps</span>
Answer:
CB = sqrt62
Step-by-step explanation:
The pythagorean theorem will help with this! First take triangle ACD, AD^2 + CD^2 = AC^2. Plug in, AD^2 + 16 = 25. AD^2 = 9. AD = 3. I'm not exactly sure how to find DB, but I can assume it's double of AD< so 6. We know CD is 4, so 4^2 + 6^2 = CB^2. 16 + 36 = CB^2. CB = sqrt62
Sorry if this isn't exactly right, there's no exact way to find DB.