Answer:
15
Step-by-step explanation:
that's what gogle said
Answer: It's A
Step-by-step explanation: X + Y is the total books, which should equal 8. Some books treat them as X, while the rest treat them as Y. You end up with 12x+18y=108.
X=12 do you need an explanation?
Answer: ![3\sqrt{3}](https://tex.z-dn.net/?f=3%5Csqrt%7B3%7D)
Step-by-step explanation:
![\tan 60^{\circ}=\frac{x}{3}\\\\\sqrt{3}=\frac{x}{3}\\\\x=\boxed{3\sqrt{3}}](https://tex.z-dn.net/?f=%5Ctan%2060%5E%7B%5Ccirc%7D%3D%5Cfrac%7Bx%7D%7B3%7D%5C%5C%5C%5C%5Csqrt%7B3%7D%3D%5Cfrac%7Bx%7D%7B3%7D%5C%5C%5C%5Cx%3D%5Cboxed%7B3%5Csqrt%7B3%7D%7D)