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Deffense [45]
3 years ago
8

Solve the equation -9(6 -4n) = 2(9n -12) - 12n​

Mathematics
1 answer:
ollegr [7]3 years ago
6 0

Answer:

n = 1

Step-by-step explanation:

Solve for n:

-9 (6 - 4 n) = 2 (9 n - 12) - 12 n

2 (9 n - 12) = 18 n - 24:

-9 (6 - 4 n) = 18 n - 24 - 12 n

Grouping like terms, 18 n - 12 n - 24 = (18 n - 12 n) - 24:

-9 (6 - 4 n) = (18 n - 12 n) - 24

18 n - 12 n = 6 n:

-9 (6 - 4 n) = 6 n - 24

Expand out terms of the left hand side:

36 n - 54 = 6 n - 24

Subtract 6 n from both sides:

(36 n - 6 n) - 54 = (6 n - 6 n) - 24

36 n - 6 n = 30 n:

30 n - 54 = (6 n - 6 n) - 24

6 n - 6 n = 0:

30 n - 54 = -24

Add 54 to both sides:

30 n + (54 - 54) = 54 - 24

54 - 54 = 0:

30 n = 54 - 24

54 - 24 = 30:

30 n = 30

Divide both sides of 30 n = 30 by 30:

(30 n)/30 = 30/30

30/30 = 1:

n = 30/30

30/30 = 1:

Answer:  n = 1

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ESTION 1 Sarah buys a new piano to the value of R 12 000. After 3 years it has a reduced value of R7 500. Determine the rate of
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The rate of depreciation on the reducing balance method is $12,000.

The Piano value at the beginning of 2017 is $75,000 – $15,000 = $60,000. Depreciation for 2017 is $60,000 × 0.2 = $12,000.

This is because the rate of depreciation (20% in this case) is applied to the book value, which decreases year after year.

In 2016, the book value was $75,000, but by 2017 it had dropped to $60,000. It was reduced to $48,000 a year later. Keep in mind that the depreciation rate remains constant, but it is applied to a smaller amount (i.e., book value) each year.

As a result, the amount of depreciation per year is lower.

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8 0
2 years ago
Factor completely X⁴-10x²+9. Please show all work.​
Tanya [424]

Answer:

Let y=x² . Then:

x4−10x2+9=y2−10y+9

y²-10y+9=(y-9)(y-1)

Substitute x² for y:

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x²-1=(x+1)(x-1)

x4−10x2+9=(x+3)(x−3)(x+1)(x−1)

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Answer:

1.9

Step-by-step explanation:

7.6/4= 1.9

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3 years ago
Click “show your work” and graph the absolute value function shown below. f(x) =|x – 4| + 1
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Answer: here u go

Step-by-step explanation:

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