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alexira [117]
3 years ago
6

there are 30 cities in a country. Each city has 4 highways coming out of it. How many highways connecting 2 cities are there in

this country?
Mathematics
1 answer:
CaHeK987 [17]3 years ago
4 0

Answer:

29

Step-by-step explanation:

There would be 29 highways connecting 2 cities

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I will give lots of points if you answer these few questions
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Answer:

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Step-by-step explanation:

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Fiesta28 [93]

Answer:

A

Step-by-step explanation:

To find the angle inside the triangle (to the right side of 90 degree angle), we first have to find the adjacent angle (below it).

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So that angle is 122.

The inside triangle angle (what we want) is adjacent to 122, so we can write:

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Solving for that angle, we have:

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Now, looking at the triangle, Side C is "opposite" of 58°  and side "20" is the side that is "hypotenuse" [side opposite of 90 degree angle is hypotenuse).

<em>Which trig ratio relates "opposite" and "hypotenuse"??</em>

<em>Yes, it is SIN. Thus we can write:</em>

<em>Sin(58)=\frac{Opposite}{Hypotenuse}=\frac{C}{20}</em>

<em />

<em>We can now solve for C:</em>

<em>Sin(58)=\frac{C}{20}\\C=20*Sin(58)\\C=16.96</em>

<em />

<em>Correct answer is A</em>

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Step-by-step explanation:

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