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gladu [14]
4 years ago
13

WILL GIVE BRAINLIEST TO WHOMEVER ANSWERS CORRECTLY FIRST!!!!!

Mathematics
1 answer:
Illusion [34]4 years ago
3 0

Answer:

Step-by-step explanation:

Since this is a 4th degree polynomial, 2 of the roots will not be real.  Finding them is next to impossible off a calculator until the real ones are found first.  That's  simple enough process.

5x^4-80=0 and

5x^4=80 Divide both sides by 5:

x^4=16 Rewrite to get

(x^2)^2=(2^2)^2 which simplifies down to

x^2=4 Taking the square root of both sides gives you the real roots of x = 2 and -2.

That leaves you with 2 roots that are imaginary.  After you factor out the 2 and the -2 by synthetic division, you are left with the depressed quadratic

5x^2+20=0  Factor out the 5:

5(x^2+4)

So the final answer is D.

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71, 80, 82, 78, 80, 91, 107, 121, 125, 131, and 142. The variance of this data set is?
adoni [48]

Answer:

636.41818

Step-by-step explanation:

^2=∑=1(−⎯⎯⎯)2−1

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^2=636.41818

I hope this helps :)

7 0
3 years ago
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5 0
3 years ago
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siniylev [52]
Okay! So to start this problem, we need to look at the given information a little closer to make sure we have everything we need! This is a triangular pyramid, meaning that it has a total of 4 sides, which are all congruent triangles, meaning they all have the same surface area! We are also given the total surface area, which is 2304 cm^2.

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