We just need to change every value to the units in the question
We have to find meters per second. In 8.5 hours, there are (8.5*60*60 = 30,600) seconds.
1 mile = 1600 meters
275.5 * 1600 = 440800.
440800/30600 = 14.40522876 meters per second
1 ft= 12 inches
24 × 18 = 432
432 × 12 = 5184
5184 cubic inches of water
5(4x-5y)-2=453
5(4x-5y)=455
4x-5y=91
When solving for x
4x=5y+91
x= 5y+91/4
When solving for y
-5y=-4x+91
y=-4x+91/-5
<em>i hope im right...</em>
Answer:
Second option is the right choice.
Step-by-step explanation:

Factor the following:
3 n^4 + 21 n^3 + 27 n^2
Factor 3 n^2 out of 3 n^4 + 21 n^3 + 27 n^2:
Answer: 3 n^2 (n^2 + 7 n + 9)