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Lady_Fox [76]
3 years ago
15

What is 20-6n=-2(n+6)?

Mathematics
1 answer:
blsea [12.9K]3 years ago
7 0

20n - 6n = -2(n + 6)

20 - 6n =-2n -12

6n + 2 n = -20 -12

8n = 32

n = 32 : 8

n = 8

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Solve by completing the square? Could you please work it out step-by-step?
DaniilM [7]
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We collect the terms:
8n^2 -10n + 137 = 0

The steps for completing the square:

1) Move the "non X" (or "non N") term to the right:

8n^2 -10n  = -137

<span>2)<span> Divide the equation by the coefficient of N² which in this case is 8
n^2 -1.2n = </span></span><span><span>-17.125 </span>

3) Take the coefficient of "N"; divide it by 2; square it; add it to both sides of the equation.
-1.2 / 2 = -.6
-.6^2 = .36

</span>
n^2 -1.2n +.36 = <span>-17.125 +.36

Take the square root of both sides:</span>
(n-.6)*(n-.6) = sq root( <span> <span> <span> -16.765 </span> </span> </span> )
That's about as far as I can go.

4 0
3 years ago
A projectile’s motion is modeled by the function given in the table, where x represents time in seconds and f(x) represents heig
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Answer: 2 seconds

Step-by-step explanation:

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4 0
2 years ago
7/12+1/3 show your work and how you got your answer and you do all that and don’t scam me I will give branlist
Yanka [14]

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2 years ago
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VashaNatasha [74]
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You’re answer is 21


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3 years ago
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