Step-by-step explanation:
Hey there!
Given;
Distance (d) = 450 km = 450*1000 = 450000 m
Time(t) = 5 hours = 5*60*60 = 18000s
Now;
Speed (s) = Distance (d) /Time(t)
Or, s = 450000/18000
Or, s = 25m/s.
Therefore, the speed is 25m/s.
<u>Hope</u><u> it</u><u> helps</u><u>!</u>
35/16
you can convert 4 and 3/8 into a mixed number 35/8 then times it by 1/2 and you get 35/16
Answer:
It will take 4.71 hours to travel a distance of 221.43 miles
Step-by-step explanation:
Given
Distance covered in time 7.99 hours is 375.32 miles.
Now we know that speed is equal to distance per unit time.
Therefore,
![speed = \frac{distance}{time} \\= \frac{375.32}{7.99}\\=46.97\ mi/h](https://tex.z-dn.net/?f=speed%20%3D%20%5Cfrac%7Bdistance%7D%7Btime%7D%20%5C%5C%3D%20%5Cfrac%7B375.32%7D%7B7.99%7D%5C%5C%3D46.97%5C%20mi%2Fh)
Which is the constant speed, hence now time taken for a distance of 221.43 miles will be
![time = \frac{distance}{speed} \\=\frac{221.43}{46.97} \\=4.71\ h](https://tex.z-dn.net/?f=time%20%3D%20%5Cfrac%7Bdistance%7D%7Bspeed%7D%20%5C%5C%3D%5Cfrac%7B221.43%7D%7B46.97%7D%20%5C%5C%3D4.71%5C%20h)
Therefore, the time taken to cover 221.43 miles is 4.71 hours.
Yes, she is absolutely correct because 32/4=8
8>4 so it make sense.
Answer:
![\boxed{12u^3+8u^2-6u+9}](https://tex.z-dn.net/?f=%5Cboxed%7B12u%5E3%2B8u%5E2-6u%2B9%7D)
Step-by-step explanation:
![(8u^3+8u^2+6)+(4u^3-6u+3) = 8u^3+8u^2+6+4u^3-6u+3](https://tex.z-dn.net/?f=%288u%5E3%2B8u%5E2%2B6%29%2B%284u%5E3-6u%2B3%29%20%3D%208u%5E3%2B8u%5E2%2B6%2B4u%5E3-6u%2B3)
Once
![8x+4x = 12x, \text{ as } x = u^3](https://tex.z-dn.net/?f=8x%2B4x%20%3D%2012x%2C%20%5Ctext%7B%20as%20%7D%20x%20%3D%20u%5E3)
![8u^3+8u^2+6+4u^3-6u+3 = 12u^3+8u^2+6-6u+3 = \boxed{12u^3+8u^2-6u+9}](https://tex.z-dn.net/?f=8u%5E3%2B8u%5E2%2B6%2B4u%5E3-6u%2B3%20%3D%2012u%5E3%2B8u%5E2%2B6-6u%2B3%20%3D%20%5Cboxed%7B12u%5E3%2B8u%5E2-6u%2B9%7D)
You don't need to factor.