3 years ago

Is 14 a rational number.?

Mathematics

1 answer:

marishachu [46]3 years ago

3 0

Answer:

yeees

Step-by-step explanation:

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Find the complex zeros of x^3+27. write f in factored form

aliina [53]

$x^3+27=0
\\x^3+3^3=0
\\(x+3)(x^2-3x+9)=0
\\x^2-3x+9=0
\\a=1,b=-3,c=9
\\
\\x_{1,2}= \frac{-b\pm \sqrt{b^2-4ac} }{2a} = \frac{-(-3)\pm \sqrt{(-3)^2-4\times1\times9} }{2\times1} =\frac{3\pm \sqrt{-27} }{2} =\frac{3\pm 3\sqrt{3}i }{2} 
\\
\\(x+3)(x-\frac{3+ 3\sqrt{3}i }{2})(x-\frac{3- 3\sqrt{3}i }{2})=0

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3 years ago

11. In a sample of n=6, five individuals all have scores of X=10 and the sixth person has a score of x=16. What is the mean for

ahrayia [7]

Answer:

Step-by-step explanation:

Given that in a sample of n=6, five individuals all have scores of X=10 and the sixth person has a score of x=16

i.e. the data entries are

10,10,10,10,10,16

Sum = 66

No of items n = 6

Average = sum/no of entries

= $\frac{66}{6} \\=11$

Average is 11.

mean of this sample is 11

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3 years ago

Selling Price is $2,640 and the Loss is $196. Find the Cost Price.

myrzilka [38]

If I am correct, it should be $2,736.

if this is a re-sell, then you would have to add the loss to the selling price to get the original cost.

loss means how much was lost in profit, so whenever you see that make sure to add it to whatever is applicable, like in this case, $2,640.

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3 years ago

Help with this math homework

fomenos

+6 ; 45,51
+ evens; 40,52
X -2; -64, 128
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3 years ago

Marissa is walking along the beach and finds an unknown organism on the shore it has radical symmetry a nonporous surface and te

frozen [14]

This is not math ? it’s physics or chem or bio or something

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3 years ago