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3 years ago

Which real world situation CANNOT be represented by

Mathematics

1 answer:

bazaltina [42]3 years ago

7 0

Answer:

D. If a number is increased by 8, then it will equal 4 times the number increased by 2. What is x?

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The ages of 11 students enrolled in an on-line macroeconomics course are given in the following steam-and-leaf display:

blsea [12.9K]

Answer:

The standard deviation of the age distribution is 6.2899 years.

Step-by-step explanation:

The formula to compute the standard deviation is:

$SD=\sqrt{\frac{1}{n}\sum\limits^{n}_{i=1}{(x_{i}-\bar x)^{2}}}$

The data provided is:

X = {19, 19, 21, 25, 25, 28, 29, 30, 31, 32, 40}

Compute the mean of the data as follows:

$\bar x=\frac{1}{n}\sum\limits^{n}_{i=1}{x_{i}}$

$=\frac{1}{11}\times [19+19+21+...+40]\\\\=\frac{299}{11}\\\\=27.182$

Compute the standard deviation as follows:

$SD=\sqrt{\frac{1}{n}\sum\limits^{n}_{i=1}{(x_{i}-\bar x)^{2}}}$

$=\sqrt{\frac{1}{11-1}\times [(19-27.182)^{2}+(19-27.182)^{2}+...+(40-27.182)^{2}]}}\\\\=\sqrt{\frac{395.6364}{10}}\\\\=6.28996\\\\\approx 6.2899$

Thus, the standard deviation of the age distribution is 6.2899 years.

7 0

3 years ago

Plz :(

Phoenix [80]

Answer:

Step-by-step explanation:

I just used a calculator and did the math

7 0

3 years ago

Read 2 more answers

The distance between two cities on a map is 4.125 inches.

Tanzania [10]

Answer:

This is really easy it's D

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

When I triple my number and add 5 I get 26 what's my number

damaskus [11]

Your number is seven

8 0

3 years ago

Read 2 more answers

Find the value of each variables

BigorU [14]

Answer:

X=11

y=22

Step-by-step explanation:

$tan60\frac{11\sqrt{3} }{x} \\\\\sqrt{3} =\frac{11\sqrt{3} }{x} \\\\x=\frac{11\sqrt{3} }{\sqrt{3} }$

⇒x=11

$Sib 60=\frac{11\sqrt{3} }{y} \\\\\frac{\sqrt{3} }{2} =\frac{11\sqrt{3} }{y} \\\\y=\frac{11\sqrt{3} }{\sqrt{\frac{3}{2} } }$

⇒ y=22

hope it helps....

8 0

3 years ago