3 years ago

If x represents a number,does 2/5 .x always represent 40% of the number

Mathematics

2 answers:

VashaNatasha [74]3 years ago

8 0

Answer:

jskslfbdns sjskkdkdbsbs

Step-by-step explanation:

idk really sorry sksksj lols jsjsjsm

marissa [1.9K]3 years ago

6 0

Answer:

Yes

Step-by-step explanation:

because it is multiplied by 0.4 and you can try placing two diffrent numbers and it will represent 40% of the placed number.

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What is the probability of flipping a coin 10 times and getting tails 7 times ? Round your answer to the nearest tenth of a perc

KatRina [158]

Answer:

Option C: 11.7%

Step-by-step explanation:

The number of elements in sample space when a coin is flipped 10 times will be:

$n(S) = 2^{10} \\= 1024$

Let A be the event that the tails appear 7 times:

Then,

$C_{(n,k)}=\frac{n!}{(k!)(n-k)!} \\where\\n=population\\k=picks\\In our case, k =7\\and\\n=10\\C_{(10,7)}= \frac{10!}{(7!)(10-3)!}\\= 120\\So, \\P(A) = \frac{n(A)}{n(S)} \\P(A) = \frac{120}{1024} \\= 0.1171\\$

Converting into percentage:

$P(A) = 0.1171*100=11.7%$

So, option C is correct ..

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Murrr4er [49]

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Alenkasestr [34]

Answer:

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Step-by-step explanation:

Communitive property is when you switch up numbers when you multiply and add but it's still the same.

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2 years ago

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