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damaskus [11]
3 years ago
12

A playground is being designed where children can interact with their friends in certain combinations. If there is 1 child, ther

e can be 0 interactions. If there are 2 children, there can be only 1 interaction. If there are 3 children, there can be 4 interactions. If there are 4 children, there can be 9 interactions. How many interactions will there be for 8 children? A. 49 B. 64 C. 36 D. 40
Mathematics
1 answer:
nikklg [1K]3 years ago
5 0

The answer to this question is option A. 49

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Emma has a board 5 feet long and cuts it into 6 equal pieces how long in feet is eacgpeace if the board in a fraction
il63 [147K]

Answer:

Imagine an easier version of this problem:  You have a board 5 feet long that you must cut (divide, right?) into two equal parts.  It is probably clear to you that you simply divide the length (5) by the number of parts you're dividing it into (2) to obtain the length of each piece (2.5 feet).

Use the same method for your problem 5 feet divided by 6 is 0.83 feet per piece.

We do not ordinarily divide feet into decimal portions, but instead into inches.  Since an inch is 1/12 of a foot, you could simply say 5/6 = how many twelfths?  or 5/6 = n/12  Solve this by inspection or by cross multiplying 5 times 12 equals n times 6.  So n must equal 10, and your pieces of board are each 10 inches long.

4 0
3 years ago
The winning 5K race time was less than 22 minutes.
Vladimir79 [104]

Answer:

im not entirely sure how to help you

Step-by-step explanation:

can you be more specific?

4 0
3 years ago
B=5a+7 -3a+2b=-7<br> What is the solution to the system of equations shown above?
anastassius [24]
But the file is not open
6 0
2 years ago
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Help please............................
Vesnalui [34]

Step-by-step explanation:

csc x / (cot x + tan x)

Write in terms of sine and cosine.

(1 / sin x) / [(cos x / sin x) + (sin x / cos x)]

Multiply top and bottom by sin x.

1 / [cos x + (sin²x / cos x)]

Multiply top and bottom by cos x.

cos x / (cos²x + sin²x)

Use Pythagorean identity.

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cos x

3 0
3 years ago
How many solutions does the following equation have?
Tom [10]

Answer:

Answer choice D, Infinitely many solutions.

Step-by-step explanation:

6x-24=6x-24

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