3 years ago

How many 3 digit numbers can be formed using the numerals of {3,2,7,9} if repetition is not allowed

Mathematics

1 answer:

Harman [31]3 years ago

8 0

4*3*2*1

24 three-digit numbers can be formed

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lyudmila [28]

$3-2(x-1)=x-10 \\\\ 3-2x+2=x-10 \\\\ -2x+5=x-10 \\\\ -2x-x=-10-5 \\\\ -3x=-15 \\\\ \boxed{x=\frac{-15}{-3}=5}$

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Vanyuwa [196]

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Step-by-step explanation:

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Rewrite the equation below so that it does not have fractions.

lidiya [134]

Answer:

$\frac{15}{20} x-2=\frac{8}{20}$

Step-by-step explanation:

$\frac{3}{4} x-2=\frac{2}{5}$

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bazaltina [42]

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gtnhenbr [62]

She would have to pay 50 dollars. Each book is 8 dollars because 5*8 is 40.

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