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anygoal [31]
3 years ago
7

1 bạn học sinh đi học từ nhà đến trường .Nửa đoạn đường đầu , bạn đi với vận tốc là 10km/h,nửa đoạn đường sau,bạn đi với vận tốc

là 15km/h.Tính Vtb của bạn học sinh trên cả quãng đường?
Mathematics
1 answer:
Marysya12 [62]3 years ago
5 0

Answer:

12km/h

Step-by-step explana:

Let's call the total distance 2a from which we can calculate t1 equivalent to the first half of the distance a/10 similar to t2 is a/15 from which the total time is a/6 . We have the average speed equal to the total distance dduowcngf divided by the total inferred time by 2a/(a/6) which equals 12km/h

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A city that has an elevation of 15 meters is closer to sea level than a city that has an elevation of -10 meters.
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Answer:

Step-by-step explanation: Your answer will be -10 because even though -10 is much lower than 15 it’s still closer to sea level.

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2 years ago
Translate: 6 less than twice a number
Basile [38]

Answer:

2x-6

Step-by-step explanation:

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6 0
3 years ago
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6 0
3 years ago
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Please Help. Tristen is building 3 trophies using Legos. He needs 324 total Legos. Tristen uses 220 Legos for the largest trophy
velikii [3]

Answer:

1. The equation is given as

324 = 220 +135 + C

2. We have 166 As the correct answer but is not in the option

Step-by-step explanation:

We are been given the following values

No. of trophies = 3

Total Legos required for all trophies = 324

No. of Legos for largest trophy(A) = 220

No. of Legos for smallest trophy(B) = 135

No. of Legos required for final trophy(C) which is unknown

Total legos will addition of everything

Total Legos = [Number of Legos for largest trophy(A) + Number of Legos for smallest trophy(B) + Number of Legos required for final trophy(C)]

Substituting the values

324 = 220 +135 + C

Making C subject of formula

324 = 355 + C

324 - 355 = C

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135 + 31 = 166

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8 0
3 years ago
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