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3 years ago

If you flip a coin 50 times, what is the best prediction possible for the number of times it will land on tails?

Mathematics

2 answers:

velikii [3]3 years ago

4 0

Answer: 25

Step-by-step explanation: 50 divided by 2 is 25

Lena [83]3 years ago

4 0

The answer to this will be 25 correct

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You bike 1 mile the first day of your training, 1.3 miles the second day, 1.9 miles the third day, and 3.1 miles the fourth d

JulsSmile [24]

Answer:

19.9 miles

Step-by-step explanation:

In this problem we have:

$d_1=1 mi$ is the distance travelled during the 1st day

$d_2=1.3 mi$ is the distance travelled during the 2nd day

$d_3=1.9 mi$ is the distance travelled during the 3rd day

$d_4=3.1 mi$ is the distance travelled during the 4th day

We notice that the difference between the distance travelled on the (n+1)-th day and the distance travelled on the n-th day doubles every day. In fact:

$d_2-d_1=0.3\\d_3-d_2=2\cdot 0.3 = 0.6\\d_4-d_3=2\cdot 0.6 = 1.2$

Which can be rewritten using the general formula:

$d_{n+1}-d_n=2(d_n-d_{n-1})$

This means that

$d_{n+1}=d_n+2(d_n-d_{n-1})$

By applying this formula recursively, we can find the 7th term, which is the distance travelled on the 7th day:

$d_1=1\\d_2=1.3\\d_3=1.9\\d_4=3.1\\d_5=3.1+2\cdot 1.2=5.5\\d_6=5.5+2\cdot 2.4=10.3\\d_7=10.3+2\cdot 4.8=19.9 mi$

So, the distance travelled on the 7th day is 19.9 miles.

7 0

3 years ago

Is the opposite of 32, is 32?

ELEN [110]

Answer:

Step-by-step explanation:

NO i think

4 0

3 years ago

At what stage will 81 new friends know about your summer job?

Degger [83]

On the 4th stage, 81 friends will be called to be told of the news

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3 years ago

What is the correlation coefficient for the data in the table?

m_a_m_a [10]

Using a rain gauge, Gerry determined that 1/2 inch of rain fell during 3/4 of an hour.What is the unit rate of rainfall in inches per hour

5 0

3 years ago

Find the slope of the line that is parallel to the line y = 2x + 5

Ugo [173]

Answer:

Step-by-step explanation:

parallel lines have same slope.

y = 2x + 5

y = mx + b

m is the slope

b is y-intercept

4 0

3 years ago