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Dennis_Churaev [7]

3 years ago

5

there were twenty one adults in line at a movie theater.That is three times the number of children in line. how many children we

re in line?

1 answer:

V125BC [204]3 years ago

7 0

You would do 21 divided by 3 and get 7.

The answer is 7 kids are in the line.

Please vote my answer the brainiest if it was helpful!!

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The surface area for the square pyramid is A= 416.23

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3 years ago

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Determine whether or not 630 is a triangular number. start with the formula t n = n ( n + 1 ) 2 and then use the quadratic formu

ziro4ka [17]

Triangular sequence = n(n + 1)/2

If 630 is a triangular number, then:

n(n + 1)/2 = 630

Then n should be a positive whole number if 630 is a triangular number.

n(n + 1)/2 = 630

n(n + 1) = 2*630

n(n + 1) = 1260

n² + n = 1260

n² + n - 1260 = 0

By trial an error note that 1260 = 35 * 36

n² + n - 1260 = 0

Replace n with 36n - 35n

n² + 36n - 35n - 1260 = 0

n(n + 36) - 35(n + 36) = 0

(n + 36)(n - 35) = 0

n + 36 = 0 or n - 35 = 0

n = 0 - 36, or n = 0 + 35

n = -36, or 35

n can not be negative.

n = 35 is valid.

Since n is a positive whole number, that means 630 is a triangular number.

So the answer is True.

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drag each expression to the correct location on the graph and equation. not all expressions will be used. complete the given dia

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What we have here in the picture is a graph of a segment. The goal is to find the segment's length, which we can do by using the distance formula:

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1 year ago

Tasya [4]

Answer:

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Step-by-step explanation:

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