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mixas84 [53]
1 year ago
10

Small tug boats pull cruise ships up and down rivers to prevent them from grounding. Cruise ships anchor 22 km away from the riv

er port. A tug boat can travel 20 km downstream in the same time it takes it to travel 10 km upstream. If the speed of the current is 5 km/h, calculate the time it takes for the tug boats to travel upstream from the cruise ship to the river port.
Mathematics
1 answer:
Shalnov [3]1 year ago
6 0

Answer:

2.2 hr

Step-by-step explanation:

Let the speed of the boat in km/h be x.

Then, the speed downstream is (x+5), and the speed upstream is (x-5).

We know the speed downstream is twice the speed upstream, so

x+5=2(x-5) \\ \\ x+5=2x-10 \\ \\ x=15

This means the speed upstream is 10 km/h. Thus, to travel 22 km, it will take 2.2 hrs.

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Answer:

145 yards squared

Step-by-step explanation:

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The area of one triangular face base times height divided by two and then simply multiplied by 4 because there are 4 triangular faces.

(\frac{5*12}{2} )*4 = 120

So the total surface area is 25+120=145 yards squared

4 0
3 years ago
Read 2 more answers
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WARRIOR [948]

The function in the graph has the name of square function.

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\mleft\lbrace x\in\R\mright\rbrace

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\mleft\lbrace y\in\R\mright|y\ge0\}

In order to graph f(x) + 2, we just need to translate the graph 2 units up. To find the new points, we need to increase all y-coordinates by 2:

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Then, in order to graph f(x) - 2, we just need to translate the graph 2 units down. To find the new points, we need to decrease all y-coordinates by 2:

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4 0
1 year ago
The dot plots below show the ages of students belonging to two groups of music classes:
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Answer:

Step-by-step explanation:

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2 years ago
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3 years ago
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vodomira [7]
Answer-3

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