<span>the line over the 28 means the 28 repeats forever.
1.282828.... and so on
let x be the rational number 1.28...
we can use this trick:
100*1.282828....= 128.282828...
(the decimal 28 part repeats)
100x = 128.28...
next:
100x - x = 128.282828... - 1.282828...
the .282828... part will be subtracted away
99x = 127
divide both sides by 99 to get
x= 127/99</span>
It isn't because, it isn't consistent, and it doesn't follow any of the other answer choices. :)
If you were to correctly simplify this equation, the answer would be a negative.
The answer is: n = -5
Here's how I got my answer:
Step 1: Add 3 to both sides. Which leaves us with ![-9n=42+3](https://tex.z-dn.net/?f=%20-9n%3D42%2B3%20)
Step 2: Simplify
to 45. Which leaves us with ![-9n = 45](https://tex.z-dn.net/?f=%20-9n%20%3D%2045%20)
Step 3: Divide both sides by -9. Which leaves us with ![n = -45/9](https://tex.z-dn.net/?f=%20n%20%3D%20-45%2F9%20)
Step 4: Simplify
, to get your answer, n = -5.
Answer: ![\Large\boxed{4x(x+12)(x-6)}](https://tex.z-dn.net/?f=%5CLarge%5Cboxed%7B4x%28x%2B12%29%28x-6%29%7D)
Step-by-step explanation:
<u>Given expression</u>
4x³ + 24x² - 288x
<u>Factorize 4x out from the expression</u>
4x · x² + 4x · 6x - 4x · 72
4x (x² + 6x - 72)
<u>Cross multiply to factorize the remaining polynomial expression</u>
<em>The meaning is to allow the factored product of the constant to add up to the first-degree term</em>
x 12
x -6
<u>Combine the result</u>
![\Large\boxed{4x(x+12)(x-6)}](https://tex.z-dn.net/?f=%5CLarge%5Cboxed%7B4x%28x%2B12%29%28x-6%29%7D)
Hope this helps!! :)
Please let me know if you have any questions
So to find the mean you add up all the numbers (or the exam scores) which will get you 212 then you take the number and divide it by the total numbers in the set (how many numbers did you add up?)
212 divided by 8 is 26.5 which would be C. I hope this helps!