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3 years ago

How many 5-letter passwords can be created if no letter can be used twice within the password?

2 answers:

7 0

If there are 5 letters used only, then 5! or 5*4*3*2 = 120
If all 26 letters of the alphabet may be used for the code, then:
26*25*24*23*22
If you mean letters of the alphabet, and not case sensitive, it's26*25*24*23*22
= 7893600

bonufazy [111]3 years ago

5 0

26*25*24*23*22=7893600

or you can use

26!/(26-5)!=7893600

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Which of the following choices are equivalent to the expression below? Check all that apply

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Answer:

Step-by-step explanation:

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3 years ago

The ratio of girls to boys in fifth grade at Travis Elementary is 2 to 3. If there are a total of 90 students in fifth grade, ho

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3 years ago

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Solve. |x+5|>12 Help it would be great

meriva

Answer:

x < - 17 or x > 7

Step-by-step explanation:

Inequalities of the form | x | > a always have solutions of the form

x < - a or x > a

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4 years ago

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4 years ago

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Ivan

Answer:

6 inches.

Step-by-step explanation:

Let a represent side length of larger square.

We know that area of square is square of its side length, so area of the larger square will be $a^2$ .

The area of smaller square would be $4^2$ .

We will use proportions to solve our given problem.

$\frac{\text{Area of smaller square}}{\text{Area of larger square}}=\frac{4}{9}$

$\frac{4^2}{a^2}=\frac{4}{9}$

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Cross multiply:

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3 years ago