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2 years ago

4. A river tour boat is going down a stream to a park for lunch and then back up. It is a 60-mile round trip. On

Mathematics

1 answer:

DiKsa [7]2 years ago

3 0

Answer:

The speed of the boat in still water is 10 miles / hour

Step-by-step explanation:

The trip there, and the trip back are the same -- 30 miles

Let the rate of the boat = x

Let the rate of the water = y

30 = 2*(x + y)

30 = 6*(x - y)

Divide the top equation by 2

Divide the bottom equation by 6

15 = x + y

5 = x - y Add the equations together.

20 = 2x Divide by 2

20/2 = x

x = 10

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3 years ago

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aliina [53]

Answer:

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Step-by-step explanation:

Given the following mathematical function;

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2 years ago

the first term of an arithmetic sequence is 3000 and the tenth term is 1200. the sum of the first 20 terms of the sequence

Kruka [31]

Step-by-step explanation:

1100

To find the sum of the first n terms of an arithmetic series use the formula,

n(a

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20(10+100)

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2 years ago

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3 years ago

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Answer:

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Step-by-step explanation:

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3 years ago