Answer:
INDIRECT!
see below
Step-by-step explanation:
A law that says that if the temperature is constant then the volume of a fixed amount of a gas is <u>inversely proportional</u> to its pressure.If the pressure on a gas increases, the volume of the gas decreases because the gas particles are getting closer together.
C is the answer...............................
16-A 18-B 19-D (not 100% sure on 16)
Answer:
![A= \frac{4}{3 + \sqrt{5} } - \frac{8}{1 + \sqrt{5} } + \frac{15}{ \sqrt{5} }](https://tex.z-dn.net/?f=A%3D%20%5Cfrac%7B4%7D%7B3%20%2B%20%20%5Csqrt%7B5%7D%20%7D%20%20-%20%20%5Cfrac%7B8%7D%7B1%20%2B%20%20%5Csqrt%7B5%7D%20%7D%20%20%2B%20%20%5Cfrac%7B15%7D%7B%20%5Csqrt%7B5%7D%20%7D%20)
![= \frac{4(3 - \sqrt{5)} }{4} - \frac{8(1 - \sqrt{5} }{ - 4} + \frac{15 \sqrt{5} }{5} = 3 - \sqrt{5 + 2 - 2 \sqrt{5 + 3 \sqrt{5 = 5} } }](https://tex.z-dn.net/?f=%20%3D%20%20%5Cfrac%7B4%283%20-%20%20%5Csqrt%7B5%29%7D%20%7D%7B4%7D%20%20-%20%20%5Cfrac%7B8%281%20-%20%20%5Csqrt%7B5%7D%20%7D%7B%20-%204%7D%20%20%2B%20%20%5Cfrac%7B15%20%5Csqrt%7B5%7D%20%7D%7B5%7D%20%20%3D%203%20-%20%20%5Csqrt%7B5%20%2B%202%20-%202%20%5Csqrt%7B5%20%2B%203%20%5Csqrt%7B5%20%3D%205%7D%20%7D%20%7D%20)
Step-by-step explanation:
![Cảm \: ơn!!!!](https://tex.z-dn.net/?f=C%E1%BA%A3m%20%5C%3A%20%20%C6%A1n%21%21%21%21)