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jeka94
3 years ago
7

What is the value of n in the equation –(2n + 4) + 6 = –9 + 4(2n + 1)?

Mathematics
2 answers:
agasfer [191]3 years ago
8 0
<span>–(2n + 4) + 6 = –9 + 4(2n + 1)

-2n - 4 + 6 = - 9 + 4*2n + 4*1
</span>
<span>-2n - 4 + 6 = - 9 + 8n + 4   
 
Take all the n's to one side and numbers to the other side. Sign changes to + or - when equality sign is crossed to other side of equation.
</span>
<span>-2n - 8n  = - 9 + 4 + 4 -6   

-10n    =  -7

n =  -7/-10

n = 7/10  or 0.7
</span>
alexdok [17]3 years ago
3 0
–(2n + 4) + 6 = –9 + 4(2n + 1) \\ \\ -2n - 4 + 6 = -9  + 4(2n + 1) \\ \\ -2n + 2 = -9 + 4(2n + 1) \\ \\ -2n + 2 = 4(2n + 1) - 9 \\ \\ -2n + 2 = 8n + 4 - 9 \\ \\ -2n + 2 = 8n - 5 \\ \\ 2 = 8n - 5 + 2n \\ \\ 2 = 10n - 5 \\ \\ 2 + 5 = 10n \\ \\ 7 = 10n \\ \\  \frac{7}{10} = n \\ \\ n =  \frac{7}{10} \\ \\

The final result is: n = 7/10 or n = 0.7.
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The correct answer would be 42.50

Work:

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BartSMP [9]

Answer:

52, 53, 54, 55, 56, 59, 60, 61, 62, 88

Step-by-step explanation:

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2 years ago
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masha68 [24]

Answer: Step-by-step explanation:

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7 0
3 years ago
Read 2 more answers
PLEASE HELP!! Compare &amp; Contrast how Completing the Square is used to Convert a quadratic function to vertex form with how i
Likurg_2 [28]

Answer:

Step-by-step explanation:

Given a general quadratic formula given as ax²bx+c = 0

To generate the general formula to solve the quadratic equation, we can use the completing the square method as shown;

Step 1:

Bringing c to the other side

ax²+bx = -c

Dividing through by coefficient of x² which is 'a' will give:

x²+(b/a)x = -c/a

- Completing the square at the left hand side of the equation by adding the square of half the coefficient x i.e (b/2a)² and adding it to both sides of the equation we have:

x²+(b/a)x+(b/2a)² = -c/a+(b/2a)²

(x+b/2a)² = -c/a+(b/2a)²

(x+b/2a)² = -c/a + b²/4a²

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√(x+b/2a)² = ±√-c/a + b²/√4a²

x+b/2a = ±√(-4ac+b²)/√4a²

x+b/2a =±√b²-4ac/2a

- Taking b/2a to the other side

x = -b/2a±√√b²-4ac/2a

Taking the LCM:

x = {-b±√b²-4ac}/2a

This gives the vertex form with how it is used to Solve a quadratic equation.

7 0
3 years ago
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Kisachek [45]
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