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marissa [1.9K]
3 years ago
11

Mean, standard deviation and variance of 7,12,15,10,16

Mathematics
1 answer:
Lyrx [107]3 years ago
4 0
Mean =12
Standard devation= 3.2863
variance???
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Use the quadratic formula to solve x2 – 5x + 3 = 0.
Anit [1.1K]

Answer:

x is 4.30 and 0.697

Step-by-step explanation:

Quadratic formular:

x =  \frac{ - b± \sqrt{ {b}^{2} - 4ac } }{2a}  \\

a » 1

b » -5

c » 3

x =  \frac{ - ( - 5)± \sqrt{ {( - 5)}^{2}  - (4 \times 1 \times 3)}  }{(2 \times 1)}  \\  \\ x =  \frac{5± \sqrt{13} }{2}

Therefore, values of x :

x =  \frac{5 +  \sqrt{13} }{2}  \:  \: and \:  \:  \frac{5 -  \sqrt{13} }{2}  \\  \\ x = 4.30 \:  \: and \:  \: 0.697

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3 years ago
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coldgirl [10]

Answer:

C

Step-by-step explanation:

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A: is correct, but not in the simplest form

B: is an improper fraction, not a mixed number.

C: is the answer in the simplest form

D: is correct but it is a reduced improper fraction.

6 0
3 years ago
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REY [17]

Answer:

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Step-by-step explanation:

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The answer to this is 2
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can someone help me out with this?? I am God awful at basic math such as this...apologies if I sound absurdly stupid;;​
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For graphs, always start with line <em>x</em> then do line <em>y</em>.

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