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sweet [91]
3 years ago
13

There were some people on a train.

Mathematics
1 answer:
Oksi-84 [34.3K]3 years ago
6 0

Answer:

62

Step-by-step explanation:

let there be X people in the beginning

so

X-18+21=65

X+3=65

X=65-3

X=62

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I need help please be sure of your answer.
Ilia_Sergeevich [38]

Answer:

Step-by-step explanation:

The top has area (3 cm)(5 cm), or:                                 15 cm^2

The bottom has the same area:                                      15 cm^2

Each of the ends has the area (3 cm)(2.5 cm):                7.5 cm^2

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Each of the sides has the area (2.5 cm)(5 cm)                12.5 cm^2

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The total lateral area is 70 cm^2

                     

8 0
3 years ago
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