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maksim [4K]
3 years ago
12

Suppose you know that a/b is equivalent to m/n, and a/b is not equivalent to x/y, is m/n equivalent to x/y? Explain your answer,

please.
Please help me and I will mark you as the best answer.
Mathematics
1 answer:
gogolik [260]3 years ago
6 0
OK so the answer- you know the a/b=m/n, and a/b is not =x/y. Because of the fact that m/n=a/b, you can use the substitution property of equality to say that m/n is not =x/y
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In a group of eighteen people, each person shakes hands once with each other person in the group. How many handshakes will occur
miv72 [106K]

The number of handshakes that will occur in a group of eighteen people if each person shakes hands once with each other person in the group is 153 handshakes

In order to determine the number of handshakes that will occur among 18 people, that is, the number of ways we can choose 2 persons from 18 people.

∴ The number of handshakes = ^{18}C_{2}

^{18}C_{2} = \frac{18!}{(18-2)!2!}

^{18}C_{2} = \frac{18!}{16!2!}

^{18}C_{2} = \frac{18\times17\times16!}{16!\times2!}

^{18}C_{2} = \frac{18\times17}{2\times1}

^{18}C_{2} = \frac{306}{2}

^{18}C_{2} = 153

∴ The number of handshakes = 153 handshakes

Hence. 153 handshakes will occur in a group of eighteen people if each person shakes hands once with each other person in the group.

Learn more here: brainly.com/question/1991469

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2 years ago
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Tamiku [17]

Answer:

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Step-by-step explanation:

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Multiply both sides by 3:

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