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3 years ago

Brian is skateboarding at 8 kilometers per hour. How long will it take Brian to travel 12 kilometers?

Mathematics

1 answer:

brilliants [131]3 years ago

4 0

Answer:

An hour and 30 minutes.

Step-by-step explanation:

In one hour, they travel 8 kilometers. They then have 4 kilometers left. 4 is half. of 8, so I would possibly take half the time it would to travel 8, making it 30 minutes for the other 4 kilometers.

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Juan fode his bike 2/3 mile to school,1/3 mile to the library,2/3 mile home far did he ride altogether

Viktor [21]

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Step-by-step explanation:

2/3+1/3+2/3=5/3=1 2/3

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3 years ago

Solve the equation x2 = 80.

mixer [17]

Answer:

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3 years ago

Area of a circle is 80 cm². Work out the circumference of the circle.

GuDViN [60]

Answer:

The circumference of circle is: 31.714 cm

Step-by-step explanation:

Let C be the circumference of the circle

And A be the area of circle

It is given that:

$A = 80cm^2$

We have to find the radius first so that it can be used to find the circumference

The area of circle is given by the formula:

$A = \pi r^2$

Putting the value of area

$80 = 3.14 * r^2\\\frac{80}{3.14} = r^2\\r^2 = 25.477$

Taking square root on both sides

$\sqrt{r^2} = \sqrt{25.477..}\\r = 5.0475\ cm$

Now

$C = 2\pi r$

Putting the value of radius

$C = 2 * 3.14 * 5.05\\C = 31.714\ cm$

Hence,

The circumference of circle is: 31.714 cm

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3 years ago

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Katyanochek1 [597]

Answer:

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