3 years ago

Enter a value for x that makes the equation 7x - 2(x + 1) + 18 = 8x - 11 true.

Mathematics

1 answer:

tino4ka555 [31]3 years ago

5 0

9
hope this helps :)

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Julli [10]

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How many ways can we award a 1st, 2nd and 3rd place prize among eight contestants?

trasher [3.6K]

Answer:

Total number of ways are 336.

Step-by-step explanation:

It is required to find the number of ways in which we can award a 1st, 2nd and 3rd place prize among eight contestants. It means we need to find the number of permutations. We need to find $^8P_3$ .

Here, r = 3

So,

$^nP_r=\dfrac{n!}{(n-r)!}\\\\^8P_3=\dfrac{8!}{(8-3)!}\\\\^8P_3=\dfrac{8!}{5!}\\\\^8P_3=\dfrac{8\times 7\times 6\times 5!}{5!}\\\\^8P_3=336$

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2 years ago

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Step-by-step explanation:

V = $a^{2} \frac{h}{3}$

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If we put this on out formula, it would look:

V = $3^{2} \frac{8}{3}$

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