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grandymaker [24]
3 years ago
13

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

Mathematics
2 answers:
serious [3.7K]3 years ago
7 0
<span>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
</span><span>If you mean letters of the alphabet, and not case sensitive, it's</span><span>26*25*24*23*22
= 7893600</span>
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 coordinate points have a y-value of 1? Select all that apply.
Nimfa-mama [501]

Answer:

B is the right answer,...B) (6, 1)

Step-by-step explanation:

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Is 9.521521521 rational or irrational
enyata [817]

If the numbers after the decimal terminate, yes, it's rational.

9.521521521 = 9,521,521,521 / 1,000,000,000

If they don't terminate, but the pattern continues (which I suspect is the case here), yes, it's still rational.

If <em>x</em> = 9.521521521…, then

1000<em>x</em> = 9521.521521521…

Subtract <em>x</em> from this to eliminate the fractional part:

1000<em>x</em> - <em>x</em> = 9521.521521521… - 9.521521521…

999<em>x</em> = 9512

<em>x</em> = 9512/999

If they don't terminate, but the pattern does <em>not</em> continue, meaning the next few digits could be something random like

9.521521521<u>19484929271283583457</u>…

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7 0
3 years ago
3(x^2-1) + 4(x^2 - 3) = 13<br><br> solve for x
Mrrafil [7]

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x=2, x=-2

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klio [65]

Answer:

174 feet squared

Step-by-step explanation:

The figure is composed of a rectangle and a right triangle

Therefore,

Area of the composite figure = area of the rectangle + area of the right triangle

= (L*W) + (½*b*h)

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Plug in the values into the equation

Area of the composite figure = (18*9) + (½*6*4)

= 162 + 12

= 174 ft²

6 0
3 years ago
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