What is the value of x? Round to the nearest tenth.
![What is the value of x Round to the nearest tenth class=](https://us-static.z-dn.net/files/d6f/86d67e2e0ae81f6ce74b4928c34ae915.png)
plug in what you know.
12² + b² = 30²
144 + b² = 900
subtract 144 from 900. You should get 756
√b² = √756
b = 27.5