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Anon25 [30]
3 years ago
10

How many 5-digit numbers can be formed from the integers 1, 2, ... , 9 if no digit can appear more than twice?

Mathematics
1 answer:
elena-14-01-66 [18.8K]3 years ago
6 0
5 digit number with no repeats
1st digit has 9 possibilities
2nd digit has 8 possibilities
3rd digit has 7 possibilities
4th digit has 6 possibilities
5th fight has 5 possibilities
Therefore the answer is:
9 x 8 x 7 x 6 x 5 = 72 x 210 = 15,120
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Help me show work please
masha68 [24]

Step-by-step explanation:

The point-slope form of an equation of a line:

y-y_1=m(x-x_1)

m - slope

(x₁, y₁) - given point

\bullet\ (2,\ 7),\ m=-4\\\\y-7=-4(x-2)\\\\\bullet(-6,\ -2),\ m=3\\\\y-(-2)=3(x-(-6))\to y+2=3(x+6)\\\\\bullet(12,\ 5),\ m=-3\\\\y-5=-3(x-12)\\\\\bullet(7,\ -6),\ m=\dfrac{1}{2}\\\\y-(-6)=\dfrac{1}{2}(x-7)\to y+6=\dfrac{1}{2}(x-7)\\\\\bullet(4,\ -5),\ m=6\\\\y-(-5)=6(x-4)\to y=y+5=6(x-4)\\\\\bullet(-8,\ 2),\ m=-\dfrac{3}{4}\\\\y-2=-\dfrac{3}{4}(x-(-8))\to y-2=-\dfrac{3}{4}(x+8)

8 0
3 years ago
Last week 24,000 fans attended a football match. this week three times as many bought tickets, but one-sixth of them cancelled t
lukranit [14]

Answer:

C. 60,000

Step-by-step explanation:

<u>Given</u>

  • 24,000 fans attended a football match
  • three times as many bought tickets
  • one-sixth of them cancelled their tickets

<u>Three times as many bought tickets</u>

24,000 * 3 = 72,000

<u>one-sixth of them cancelled their tickets</u>

72,000 * 1/6 = 12,000

<u>Subtract</u>

72,000 - 12,000 = 60,000

<u>Answer</u>

60,000 people are attending this week

6 0
3 years ago
Please help! :):):);)
AnnZ [28]

Answer:

So 60% of this unknown number is 28

Let this unknown number be n

60/100 × n = 28

0.60 × n = 28

n = 28/0.6

n = 46.7

To the nearest wholw number is 47

So there are 47 votes in total

6 0
3 years ago
A bacteria culture starts with 100 bacteria and doubles in size every half hour. (a) how many bacteria are there after 4 hours?
Savatey [412]
19200 all you have to do to figure this out is multiply 100 times 8 since the is 8 halfs in 4 hours.
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5 0
3 years ago
Solve for v: -10=-5/4v
vagabundo [1.1K]

Answer:

v = 8

Step-by-step explanation:

-10= -5/4v first multiply both sides of the equation by -4/5

-10(-4/5) = v this cancels out the right side.

multiply the left side.

so you are left with 40/5 = v

next, simplify you will get 8=v

8 0
3 years ago
Read 2 more answers
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