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natka813 [3]
3 years ago
5

1/4+(-1/3)•1/2 what’s the answer to this math problem

Mathematics
1 answer:
Julli [10]3 years ago
6 0

Answer:

0.08333333... or 0.0834

Step-by-step explanation:

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A fair coin is flipped twelve times. What is the probability of the coin landing tails up exactly nine times?
seraphim [82]

Answer:

P\left(E\right)=\frac{55}{1024}

Step-by-step explanation:

Given that a fair coin is flipped twelve times.

It means the number of possible sequences of heads and tails would be:

2¹² = 4096

We can determine the number of ways that such a sequence could contain exactly 9 tails is the number of ways of choosing 9 out of 12, using the formula

nCr=\frac{n!}{r!\left(n-r\right)!}

Plug in n = 12 and r = 9

       =\frac{12!}{9!\left(12-9\right)!}

       =\frac{12!}{9!\cdot \:3!}

       =\frac{12\cdot \:11\cdot \:10}{3!}            ∵ \frac{12!}{9!}=12\cdot \:11\cdot \:10

       =\frac{1320}{6}                   ∵ 3!\:=\:3\times 2\times 1=6

       =220

Thus, the probability will be:

P\left(E\right)=\frac{n\left(E\right)}{n\left(S\right)}

         =\frac{220}{4096}

         =\frac{55}{1024}

Thus, the probability of the coin landing tails up exactly nine times will be:

P\left(E\right)=\frac{55}{1024}

4 0
3 years ago
Whats does 9+10 equal to?
Ymorist [56]
19 is the answer for this question
7 0
3 years ago
Can someone help me please
xeze [42]

9514 1404 393

Answer:

  slope = 1

Step-by-step explanation:

In the attachment, we have shown rise and run as 3 units each. The segments could be drawn 1 unit long. In any event, the ratio is the slope:

  slope = rise/run = 3/3

  slope = 1

_____

It is most convenient to draw the rise and run segments from/to places where the line crosses grid intersections. Often, but not always, the y-intercept will be such a point. Then you can look for the nearest grid crossing for figuring rise and run.

Here, the y-intercept is (0, 1), and the closest grid crossing to the right is (1, 2). The rise is 2-1 = 1, and the run is 1-0 = 1. The ratio is 1/1 = 1, same as above. The ratio of rise to run will be the same everywhere for a straight line.

4 0
2 years ago
A fax machine and a printer cost a total of $840. If the printer costs $360 more than the fax machine, how much did the fax mach
USPshnik [31]
I think it would cost $120 dollars I'm not quite sure...
4 0
3 years ago
Read 2 more answers
The measure of ∠M is 57°. What is the measure of its complementary angle?
aev [14]

Answer:

A) 33

Step-by-step explanation:

Complementary angles mean they add up do 90. SO x+57 = 90

so then x=33 the correct answer is A)

4 0
3 years ago
Read 2 more answers
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