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vova2212 [387]
2 years ago
9

A train travels 228km in 4 hours and 45 minutes. What is its average speed in kilometers per hour?

Mathematics
1 answer:
nevsk [136]2 years ago
4 0

Answer:

48 km/h

Step-by-step explanation:

The average speed is calculated by distance divided by time. So 228 / 4.45 gets the answer.

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Step-by-step explanation:


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3 years ago
Please help me! The answer choices are included in the picture.​
Murljashka [212]

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C

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The three sides of a triangle are n, 3n+3, and 2n+11. If the perimeter of the triangle is 50 inches, what is the length of each
mylen [45]

Answer:

6, 21, and 23 inches

Step-by-step explanation:

The perimeter of a triangle is equal to the sum of all side lengths in that triangle. We're given the perimeter as 50 inches, and the side lengths as n, 3n + 3, and 2n + 11.

  • This means that we can algebraically solve the equation n + 3n + 3 + 2n + 11 = 50

Step 1: Combine like terms.

  • (n+3n+2n) + (3+11) = 50
  • 6n + 14 = 50

Step 2: Subtract 14 from both sides.

  • 6n + 14 - 14 = 50 - 14
  • 6n = 36

Step 3: Divide both sides by 6.

  • 6n/6 = 36/6
  • n = 6

Step 4: Plug in the value of n as 6 in each side.

  • (6) + (3(6) + 3) + (2(6)+11) = 50
  • (6) + (18+3) + (12+11) = 50
  • (6) + (21) + (23) = 50  

Therefore, the side lengths are 6, 21, and 23 inches.

Have a lovely rest of your day/night, and good luck with your assignments! ♡

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2 years ago
5. One ship sailed from Hawaii on a course represented by the equation 3 215 2 y x . Another ship left Tahiti on a course repres
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3 years ago
Main street Auto Leasing has a ratio of cars to trucks that is 9:4.
olchik [2.2K]

Answer:

I hope you understood! Good luck with the rest of your class :)

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3 years ago
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