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o-na [289]
3 years ago
5

Radical expressions Help pls multiple choice

Mathematics
1 answer:
Ann [662]3 years ago
8 0

Answer:

4th option (sqrt(10))/2

Step-by-step explanation:

\frac{5}{\sqrt{10} }  *  \frac{\sqrt{10}}{\sqrt{10} } \\  \frac{5\sqrt{10}}{10} \\\\frac{\sqrt{10}}{2}

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Find the measure of the arc or angle indicated. Part 1. NO LINKS.​
andreev551 [17]

Answer:

Step-by-step explanation:

1)

O = center of circle (origin)

we know that the angle at the center of the circle ∠ ROS will be

180= 2(31) + ∠x

180-62 = ∠x

118° = ∠x

The supplemental angle to the 118° will be 62°

62° is the interior angle to  arc QR , so

arc QR is also 62°

3)

b/c the intercepted arc YZ = 2* 68=136

then 136+125+? = 360

? = 99°

arc ZX = 99°

5)

O= center point

we are given the two arcs  120 and 70 for both of these we know that the

interior angles will be the same.  ∠JOX  has a central angle of 120 , then

b/c triangle JOX is an isosceles,  we know that the two angles J and X of

the triangle JOX will be 1/2 of  60 , or 30 each

also for    

also ∠XOY has an interior angle of 70 so the two angle at X and Y will be 1/2 of 110 , or 55°

now add 55+30 to find X for box XYZJ

85° = ∠X  

5 0
3 years ago
Read 2 more answers
Please help! 35 equals 45-n;10,11,12
Alex
35 = 45 -12
Nope

35 = 45 -11
Nope

35 = 45 - 10
Yep!

10 is your answer!

<span>Hope I helped! (Pick my answer as brainliest!)</span>
3 0
3 years ago
The average number of mosquitoes in a stagnant pond is 80 per square meter with a standard deviation of 12. If 36 square meters
svp [43]

Answer:

a) 18.4%

Step-by-step explanation:

Assuming a normal distribution, the z-score (z) for the probability of the average of the mosquitoes count being 'X'  is given by:

z(X)=\frac{X-\mu }{\frac{\sigma}{\sqrt{n}}}

Where 'μ' is the distribution mean, 'σ' is the standard deviation and 'n' is the number of square meters chosen.

For X = 81.8 and n=36:

z(X)=\frac{81.8 - 80}{\frac{12}{\sqrt{36}}}\\z(X)= 0.9

A z-score of 0.9 is equivalent to the 81.59 th percentile in a normal distribution.

Therefore, the probability (P) that the average of those counts is more than 81.8 mosquitoes per square meter is:

P= 100\% - 81.59\%\\P=18.41\%

8 0
3 years ago
How do i do this problem 13×1/2
mario62 [17]
13x1/2 is the same as 13/2.
5 0
3 years ago
Which formula is used to calculate the standard deviation of sample data?<br>​
Reptile [31]

Answer:

Standard deviation (S) = square root of the variance

Standard deviation is the measure of spread most commonly used in statistical practice when the mean is used to calculate central tendency. Thus, it measures spread around the mean

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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