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3 years ago

Which 30°-60°-90° triangle is labeled with the correct side length ratio?

Mathematics

2 answers:

Allushta [10]3 years ago

5 0

Answer:

Step-by-step explanation:

- 60

__________

- 30

________

Alex777 [14]3 years ago

3 0

Answer:

It's answer A. (first one on the left)

Step-by-step explanation:

Answer A.

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$12.96

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3 years ago

A triangle has the sides of 7 in, 14 in, and 25 in. Is it a right triangle?

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Answer:

No it does not equal a right triangle.

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2 years ago

Solve and graph the inequality 16x<-64

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Answer:

75 po ang sagot

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2 years ago

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The city of Madison regularly checks the quality of water at swimming beaches located on area lakes. Fifteen times the concentra

Maksim231197 [3]

Answer:

The sample standard deviation is 393.99

Step-by-step explanation:

The standard deviation of a sample can be calculated using the following formula:

$s=\sqrt[ ]{\frac{1}{N-1} \sum_{i=1}^{N}(x_{i}-{\displaystyle \textstyle {\bar {x}}}) ^{2} }$

Where:

$s=$ Sample standart deviation

$N=$ Number of observations in the sample

${\displaystyle \textstyle {\bar {x}}}=$ Mean value of the sample

and $\sum_{i=1}^{N}(x_{i}-{\displaystyle \textstyle {\bar {x}}}) ^{2} }$ simbolizes the addition of the square of the difference between each observation and the mean value of the sample.

Let's start calculating the mean value:

$\bar {x}=\frac{1}{N} \sum_{i=1}^{N}x_{i}$

$\bar {x}=\frac{1}{15}*(180+1600+90+140+50+260+400+90+380+110+10+60+20+340+80)$

$\bar {x}=\frac{1}{15}*(3810)$

$\bar {x}=254$

Now, let's calculate the summation:

$\sum_{i=1}^{N}(x_{i}-\bar {x}) ^{2} }=(180-254)^2+(1600-254)^2+(90-254)^2+...+(80-254)^2$

$\sum_{i=1}^{N}(x_{i}-\bar {x}) ^{2} }=2173160$

So, now we can calculate the standart deviation:

$s=\sqrt[ ]{\frac{1}{N-1} \sum_{i=1}^{N}(x_{i}-{\displaystyle \textstyle {\bar {x}}}) ^{2} }$

$s=\sqrt[ ]{\frac{1}{15-1}*(2173160)}$

$s=\sqrt[ ]{\frac{2173160}{14}}$

$s=393.99$

The sample standard deviation is 393.99

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3 years ago

12. What is the sum of angles aº+bº?

BigorU [14]

Answer:

240

Step-by-step explanation:

360-(60+60) = 240

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3 years ago

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