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Ira Lisetskai [31]
3 years ago
12

What is the answer to this?

Mathematics
1 answer:
saul85 [17]3 years ago
6 0
A) Who would not love birdies??
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A submarine cruises underwater at 20 km/h and on
Darina [25.2K]

Answer:

System of equations:

20x + 30y = 650

x + y = 25

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Step-by-step explanation:

Let x = time underwater at 20 km/h.

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speed = distance/time

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distance on the surface: 30y

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total time: x + y

total time: 25

x + y = 25

20x + 30y = 650

x + y = 25

20x + 30y = 650

-20x - 20y = -500

--------------------------------

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x + y = 25

x + 15 = 25

x = 10

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3 years ago
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