Using trigonometry. tan, cos, sin etc. idk how to do thisss

If the average of x,y and z is 15 what is their sum

Orla and eduardo each looked at a strand of their hair under a microscope and measured the diameter. orla's strand was 0.005\,\text{cm}0.005cm in diameter, and eduardo's strand was 0.012\,\text{cm}0.012cm in diameter.

Identify two possible solutions to the system, ≤2−2 and < −2/3−5