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2 years ago

Is 4n-2 equivalent to 2(n-1)

Mathematics

2 answers:

noname [10]2 years ago

7 0

No, when you do 4n-2 it equals to 2(2n-1) not 2(n-1)

8_murik_8 [283]2 years ago

4 0

Answer:

Step-by-step explanation:

For example: 4(2)-2 and 2(2-1)

6 is not equal to 2

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Masteriza [31]

The probability that you can get N heads in a row would be:

Let p be the probability of flipping a heads. Let x be number of flips needed to achieve h consecutive heads. The solution is E(x) = (1−p^h) / (p^h(1−p))

This expression may be derived as follows. The probability of being successful immediately is p^r. However, one might get a tails immediately. In that case, the number of flips needed is 1+E(x) (one flip has been used and we are back to the original position). We might get a heads and then a tails. In this case two flips have been used and we are back to the original position. Continue this up to h−1 heads followed by a tails in which case h flips have been used and we are back to the original position.

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3 years ago

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2 years ago

A sample of 100 footballs showed an average air pressure of 13 psi. The standard deviation of the population is known to be .25

Vladimir79 [104]

Answer:

0.025 is the standard error of mean.

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 100

Sample mean = 13 psi

Population standard deviation = 0.25 psi

We have to find the standard error of the mean.

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3 years ago

When would you use a table to display data? When would you would use a graph to display data?

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A table would help to organize more information than a graph would. A graph would help more with numbers.

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3 years ago

Eli and Karl each throw a basketball straight up in the air at the same time. Eli is standing on a deck and the height of his ba

tino4ka555 [31]

We are to find the time at which the height of basketball thrown by Eli and Karl is equal. We have the functions which model the heights of both basketballs. So by equating the functions representing the height of both basketballs we can find the value of x from that equation at which the height is same for both basketballs.

$-4.9 x^{2} +12x+2.5=-4.9 x^{2} +14x \\ \\ 
12x+2.5=14x \\ \\ 
2.5=2x \\ \\ 
x=1.25$

Thus after 1.25 seconds the height of basketballs thrown by Eli and Karl will be at the same height. This can be verified by finding the heights of both at x=1.25

For Eli:
$Height=f(1.25)=-4.9 (1.25)^{2}+12(1.25)+2.5=9.84375$

For Karl:
$Height=f(1.25)=-4.9 (1.25)^{2}+14(1.25)=9.84375$

Thus height of both basketball is equal after 1.25 seconds

5 0

3 years ago

Read 2 more answers