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luda_lava [24]
3 years ago
8

PLEASE help me with these and explain how you get the answer :)

Mathematics
1 answer:
natima [27]3 years ago
8 0
For each question you want to isolate for the variable. It is important to remember that what you do to one side of the equation, you must do to the other. You isolate by preforming the opposite function. So to isolate where there is addition, you would subtract and vice versa. All of these equations are done with multiplication so you undo or isolate them by division. 7 is asking what you multiply (-1/4) by to get (1/18). To isolate for p, you need to divide by (-1/4). (1/18)/(-1/4)=(-2/9). You can check your work by substituting your answer back into the equation. (-1/4)(-2/9)=(1/18). Therefore, p = (-2/9)

8 is the same. To isolate for w, you need to divide by (11/-12). -1/(11/-12)=(12/11).
W = (12/11). Again you can double check by substituting your answer back into the equation where your variable once was.

9 tries to trick you by making the equation equal to 0. The same method used for 7 and 8 will work here as well. You could also solve by knowing that anything multiplied by 0 is equal to 0. So x = 0.

In order to have both sides of the equation look the same in 10, you want to multiply 2 by 9 = 18, and then add 2. After doing this, your equation looks like (2/3)m = (20/9). You then want to isolate for m by dividing (20/9) by (2/3).
(20/9)/(2/3)=(10/3).
Therefore, m = (10/3)
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mina [271]

Answer: Domain: {2}


Step-by-step explanation:

1. By definition, the domain is the input value, this means that it is the x-value of a function.

2. Therefore, keeping the definition above on mind, you have that the domain of x is the x-value of each ordered pair.

3. Then, given x = {(2, 3), (2, 4), (2, 5), (2, 6)}, you can see that x-value of each ordered pair is 2. Therefore, you can conclude that the domain of x is:

Domain:{2}

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3 years ago
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Kelly has ¾ of a pie left. She wants to split the pie with 3 of her friends. How much of the pie will each person get?
spin [16.1K]

Answer: 3/16 of a pie.

Step-by-step explanation: To find the answer, we divide 3/4 by 4 to get 3/16. Thus, each person will get 3/16 of a pie.

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It was reported that in a survey of 4794 American youngsters aged 6 to 19, 15% were seriously overweight (a body mass index of a
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Answer:

The 99% confidence level for the proportion of all American youngsters who are seriously overweight is (0.137, 0.163)

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

n = 4794, \pi = 0.15

99% confidence level

So \alpha = 0.01, z is the value of Z that has a pvalue of 1 - \frac{0.01}{2} = 0.995, so Z = 2.575.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.15 - 2.575\sqrt{\frac{0.15*0.85}{4794}} = 0.137

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.15 + 2.575\sqrt{\frac{0.15*0.85}{4794}} = 0.163

The 99% confidence level for the proportion of all American youngsters who are seriously overweight is (0.137, 0.163)

3 0
3 years ago
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The answer is 3n+1

What i did was add the like terms.

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if you put it together you get 3n+1

hope this helps

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Answer:

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