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n200080 [17]
3 years ago
5

The perimeter of a triangle

Mathematics
1 answer:
Umnica [9.8K]3 years ago
6 0

Answer: sum of all the given three sides

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Find the mean, standard deviation, and variance of Lucas's lunch expenditures. Round to the nearest thousandth.
olga2289 [7]
So mean is pretty easy to calculate; you just add everything up and divide by the number of things you added. Variance is pretty tricky because it involves subtracting the mean from each number, squaring that, adding all of the numbers up, and then dividing by the number of things. Then standard deviation is just the square root of the variance. Although some might enjoy spending hours figuring these out (I actually had to take a class where we only did this and stuff like it), most of us who use statistical tests do not want to waste our time on it. It is for that reason that there are websites that will compute all of these and all you have to do is put in the numbers. A pretty good one is:

http://www.calculator.net/standard-deviation-calculator.html

This one will calculate these and almost any other tests you need.

Now to your problem, if we add all of them up and divide by N (the # of things added), then we will get a mean of (μ=$5.10). From this, we can do further descriptive statistics. Standard Variance of the sample was calculated to (s^2=0.254). If we take the square root of the variance, we get a standard deviation of (s=0.504). I hope that this helps you with this problem and I hope that I helped for future problems by introducing the variance and standard deviation calculator to you!
7 0
3 years ago
On his fishing trip Justin rides on hist 12 km south. The fish aren't biting so he changes location and goes 4 km west. What is
Sati [7]

Answer:

Justin's displacement is 12.65 km.

Step-by-step explanation:

Since Justin rides 12 km south, then 4 km west, his displacement can be determined by applying Pythagoras theorem to the sketch of his journey. Let his displacement be represented by s,

/Hyp/^{2} = /Adj1/^{2} + /Adj2/^{2}

s^{2} = /4/^{2} + /12/^{2}

   = 16 + 144

s^{2}  = 160

⇒ s = \sqrt{160}

      = 12.6491

s ≅ 12.65 km

Justin's displacement is 12.65 km.

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3 years ago
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B. 35.69 

mark as brainiest please and thank you.
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3 years ago
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HELP ASAP PLSSSS (MNATH, BRAINLIST) HELP PLS!!!
Nadusha1986 [10]

Answer is 180 degree

Hope it helps

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The O'Niell family decided to book a hotel for a trip to Orlando, FL from Saturday 6/3 through Friday 6/9. They decide to stay a
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Six nights.

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