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2 years ago

Please hurry!!!! The quotient of 56 and n is multiplied by 3.

2 answers:

8 0

Answer: n8→ I used n as the unknown number. Explanation: The quotient is the result of division between two numbers. The quotient of a number (I used n ) and 8 would be n8.

Step-by-step explanation:

Mariana [72]2 years ago

7 0

I think it's 56/n=3n.

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You are interested in estimating the the mean age of the citizens living in your community. In order to do this, you plan on con

Assoli18 [71]

Question:

You are interested in estimating the the mean age of the citizens living in your community. In order to do this, you plan on constructing a confidence interval; however, you are not sure how many citizens should be included in the sample. If you want your sample estimate to be within 5 years of the actual mean with a confidence level of 97% , how many citizens should be included in your sample? Assume that the standard deviation of the ages of all the citizens in this community is 18 years.

Answer:

61.03

Step-by-step explanation:

Given:

Standard deviation = 18

Sample estimate = 5

Confidence level = 97%

Required:

Find sample size, n.

First find the Z value. Using zscore table

Z-value at a confidence level of 97% = 2.17

To find the sample size, use the formula below:

$n = (Z * \frac{\sigma}{E})^2$

$n = ( 2.17 * \frac{18}{5})^2$

$n = (2.17 * 3.6)^2$

$n = (7.812)^2$

$n = 61.03$

Sample size = 61.03

4 0

3 years ago

. If sin(x + y)=sin x.cos y+cos x.sin y, then find the value of sin 75 degrees

miv72 [106K]

Answer:

$\sf \dfrac{\sqrt{6}+\sqrt{2}}{4}$

Step-by-step explanation:

<h3>Trigonometry:</h3>

75 = 45 + 30

Sin (x + y) = Sin x *Cos y + Cos x * Sin y

Sin (45 + 30) = Sin 45 * Cos 30 + Cos 45 * Sin 30

$\sf =\dfrac{1}{\sqrt{2}}*\dfrac{\sqrt{3}}{2}+\dfrac{1}{\sqrt{2}}* \dfrac{1}{2}\\\\\\=\dfrac{\sqrt{3}}{2\sqrt{2}}+\dfrac{1}{2\sqrt{2}}\\\\\\=\dfrac{\sqrt{3}*\sqrt{2}}{2*\sqrt{2}*\sqrt{2}}+\dfrac{1*\sqrt{2}}{2\sqrt{2}*\sqrt{2}}\\\\\\=\dfrac{\sqrt{6}}{2*2}+\dfrac{\sqrt{2}}{2*2}\\\\\\=\dfrac{\sqrt{6}+\sqrt{2}}{4}$

7 0

1 year ago

Simplify 16m-9n+4n-10n

OverLord2011 [107]

To simplify that expression, you need to combine line terms so in order for you to go that, you would need to combine -9n, +4n, and -10n

You would get: 16m-15n

5 0

2 years ago

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PLEASE HELP ME ASAP I WILL GIVE YOU BRAINLEST. PLEASE PLEASE I BEG OF YOU

Karo-lina-s [1.5K]

Answer:

Hiii, I really did try my best, hopefully this helps :)

Step-by-step explanation:

1st: 37.5 units

2nd: 34.5 units

3rd: 24 + 9.125 π units

4th: 42 units

5th: 49.5 units

6 0

2 years ago

8×1/8=1 exemplifies what property

Phoenix [80]

Answer:

Looks like identity property of multiplication

Step-by-step explanation:

5 0

3 years ago

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