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professor190 [17]
3 years ago
8

A migrating bird flies 42 miles in 3 hours. How many miles does it fly in 5 hours?

Mathematics
2 answers:
sergejj [24]3 years ago
6 0

Answer:

70 miles.

Step-by-step explanation:

In this question we are given the speed of the migrating bird. If we remember the definition of speed we will remember that speed is distance the object/body traveled, divided by the time it took the object/body to travel this distance.

Solution:

Firstly we need to find out what distance will the bird travel in 1 hour.  We can easily do that science we know the distance it travels in 3 hours. So we just use the property of a fraction that states that if we multiply or divide the denominator and the numerator by the same number we will get a fraction of the same value but written a bit differently. So we divide the numerator and the denominator by 3 and get

\frac{42 miles}{3 hours} = \frac{14 miles}{1hour}

Now we know what distance the bird travels in one hour so we can easily figure how much the bird will travel in 5 hours by multiplying the numerator and the denominator by 5. So we do...

\frac{14 miles}{1 hour} = \frac{70 miles}{5 hours}

And we get that the bird will travel 70 miles in 5 hours.

Snezhnost [94]3 years ago
4 0
42/3 = 14 miles per hour
14 * 5 = 70
Solution: 70 miles
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280.5 mm^2

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scale * 25.5 mm = 127.5 mm      1275/25.5 = 5   scale factor  

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2 years ago
An actor invests some money at 7%, and $48000 and more than twotimes the amount of 9%. The total annual interest earned from the
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Answer:

At 7% $54,000

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Step-by-step explanation:

Let x be the amount invested at 7%, Then 2x + 48000 will be the amount invested at 9%

We know that:

7% = 0.07 & 9% = 0.09

So we can write the interest equation as follows:

0.07x + 0.09 (2x + 48000) = 17820

0.07x + 0.18x + 4320 = 17820

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Subtracting 4320 from both sides of the equation we get:

0.25x = 17820 - 4320

0.25x = 13500

Dividing both sides of the equation by 0.25 we get:

x = 13500 / 0.25

x = $54,000 invested at 7%

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Hence the amount invested at 7% is $54,000.

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4 years ago
If there are 3500 students in a school and 3/7 of them
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Answer:

1500

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3/7 of 3500

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5 months

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Step-by-step explanation:

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