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4 years ago

How many possible three-digit passwords can be formed using digits 0 through 9 if no digits are repeated?

Mathematics

1 answer:

sammy [17]4 years ago

6 0

The answers for this question would be:
<span>30
720
1,000</span>

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2v^2-12 =-12v <br> Would really appreciate it loves❤️

Black_prince [1.1K]

For this case we have the following equation:

$2v ^ 2-12 = -12v$

Rewriting we have:

$2v ^ 2 + 12v-12 = 0$

Dividing by 2 to both sides of the equation:

$v ^ 2 + 6v-6 = 0$

We apply the quadratic formula:

$x = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2a}$

We have to:

$a = 1\\b = 6\\c = -6$

Substituting:

$x = \frac {-6 \pm \sqrt {6 ^ 2-4 (1) (- 6)}} {2 (1)}\\x = \frac {-6 \pm \sqrt {36 + 24}} {2}\\x = \frac {-6 \pm \sqrt {60}} {2}\\x = \frac {-6 \pm \sqrt {4 * 15}} {2}\\x = \frac {-6 \pm2 \sqrt {15}} {2}$

Thus, we have two roots:

$x_ {1} = - 3+ \sqrt {15}\\x_ {2} = - 3- \sqrt {15}$

ANswer:

$x_ {1} = - 3+ \sqrt {15}\\x_ {2} = - 3- \sqrt {15}$

7 0

3 years ago

Need help solving for Y

Strike441 [17]

6 is the answert ot hsi

8 0

3 years ago

Read 2 more answers

PLEASE HELP ASAP!!

Airida [17]

Answer:

Step-by-step explanation:

Hey There so the first step of this problem is to find the formula for circumference

$C=2\pi r$

given some of the values we can form an equation to solve for the radius (r)

$31.4=3.14(2)r\\3.14(2)=6.28\\31.4=6.28r\\\frac{31.4}{6.28} =5$

so we can conclude that the radius is equal to 5

7 0

3 years ago

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What is the equation of the following graph

MrRa [10]

on the very far left it says (5,-1.5)

5 0

3 years ago

What is the correct answer...<br> 7x(3+6-2)+x-5

spayn [35]

7x(3+6−2)+x−5

Combine Like Terms:

=49x+x+−5

=(49x+x)+(−5)

=50x+ −5

I hope this helps!

8 0

3 years ago