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2 years ago

-18 = -6n - 6 + 2n Solve for n.

Mathematics

1 answer:

vodomira [7]2 years ago

3 0

Answer:

n = 3

Step-by-step explanation:

-18 = -6n - 6 + 2n

-18 = -6n +2n -6 (Combine like terms)

-18= -4n -6

-18+6= -4n -6+6 (Addition Property of Equality)

-12 = -4n

-12/-4 = -4n/-4 (Division Property of Equality)

3=n

The value of 'n' is 3.

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The mean of five numbers is 8. when another number is added the mean is 7. find the number added

sasho [114]

Answer:

$\large \boxed{\sf \ \ 2 \ \ }$

Step-by-step explanation:

Hello,

<u>The mean of five numbers is 8</u> so we can write

$\dfrac{x_1+x_2+x_3+x_4+x_5}{5}=8$

<u>When another number is added the mean is 7</u>, let s note x the another number we can write

$\dfrac{x_1+x_2+x_3+x_4+x_5+x}{6}=7$

From the first equation we can say

$x_1+x_2+x_3+x_4+x_5=8*5=40$

So the second equation becomes

$\dfrac{x_1+x_2+x_3+x_4+x_5+x}{6}=7\\\\ \dfrac{40+x}{6}=7\\\\40 + x = 6*7=42\\\\ x = 42-40 = 2\\$

The solution is then 2

Hope this helps

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2 years ago

Point (-4,-8) Reflected across the y-axis

nekit [7.7K]

Answer:

(4,-8)

Step-by-step explanation:

Where is the point on the opposite side of the y-axis?

The answer would be (4, -8)

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1 year ago

Factor completely m^7n+64mn^2

Serga [27]

Factor completely m^7n+64mn^2

mn(m^6+64n)

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2 years ago

How do I find 16% of 575

True [87]

Answer:

because im god and god is good and 9 x 10 is 99999

Step-by-step explanation:

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2 years ago

Read 2 more answers

Select all sets in which the number 3/7 is an element.

frosja888 [35]

Answer:

A. integers and b. rational numbers

Step-by-step explanation:

I am unsure if it is any of the others but I know it is these two.

Hope I helped some.

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2 years ago

-18 = -6n - 6 + 2n Solve for n. ​

-18 = -6n - 6 + 2n Solve for n.