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Natalka [10]
2 years ago
10

5miles=8km how many miles is in 80km

Mathematics
1 answer:
Aneli [31]2 years ago
8 0

Answer: 50 miles


Step-by-step explanation:

Figuring this out is fairly simple, all you need to do is find out how many sets of 8 km are in 80km and multiply that number by 5. So you divide 80 by 8 and you get 10, then multiply 10 by 5 and you'll get 50. There are 50 miles in 80km.


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mixer [17]

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the base is 9/2 ft and the height is 9/2 + 8, or 25/8, ft.

Step-by-step explanation:

Note that the formula for the area of a triangle is A = (1/2)(base)(height).  Let's abbreviate that to A = (1/2)(b)(h).   We are told that h = b + 8.

Then A = 136.5 = (1/2)(b)(b + 8), or

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b^2 + 8b - 273 = 0

The coefficients of this quadratic are a = 1, b = 8 and c = -273.

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The roots are then

      -8 ± √1156            -8 ± 17

x = --------------------  =  ------------ = 9/2 and -25/2

              2                          2

Only the root 9/2 makes sense here, because measurements of length are positive.

Thus, the base is 9/2 ft and the height is 9/2 + 8, or 25/8, ft.

3 0
3 years ago
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