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Phoenix [80]
4 years ago
14

The mean of seven numbers is 12.0. When one new number is added , the average of eight numbers becomes 12.5 . What is the new nu

mber?
Mathematics
2 answers:
Gnesinka [82]4 years ago
8 0
(12 * 7 + n)8=12.5
(12 * 7 + n)= 100
N= 16. The new number will be 16. Hope this helps. :)
Varvara68 [4.7K]4 years ago
6 0
I agree that the answer is 16. Just plugging the number into a equation equaled to 100
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Create an equivalent ratio to 5:2 by multiplying both sides by 2.<br> What is the equivalent ratio?
skelet666 [1.2K]

Answer:

10/4

Step-by-step explanation:

Randomthing2143 is right

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3 years ago
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6 0
3 years ago
Please no wrong answers <br>what to do next??​
Finger [1]

Step-by-step explanation:

I am not sure what you want to calculate as ultimate goal.

but your have an error already in your third line in the picture.

(3-6i)(2-4i) = 3×(2-4i) - 6i(2-4i)

you had there a "+" instead of a "-".

and then you made subsequent mistakes in every line, some of them are funnily bringing you more back to the real result (e.g. -12i + 12i would be 0 and not -24i, but if the third line would have been correct, then yes, -24i is actually needed) - but not completely.

= 3×2 - 3×4i - 6i×2 + 6i×4i =

= 6 - 12i - 12i + 24×-1 = 6 - 24i - 24 = -24i - 18

then in the last 3 lines you kind of lose it completely. I am absolutely not sure, what you are calculating, and where the "+" cube from instead of "×" (multiplications) and such.

(3+6i)(2+4i) = 3×2 + 3×4i + 6i×2 + 6i×4i =

= 6 + 12i + 12i + 24×-1 =

= 6 + 24i - 24 = 24i - 18

is that what you wanted to show ?

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Answer:

Polynomial is the general term, but some polynomials can be classified in a more specific way.

Step-by-step explanation:

This is exactly how Polynomials work: Polynomial is the general term, but some polynomials can be classified in a more specific way. A polynomial is any sum (or difference) of terms. A term is separated by a plus or minus sign (that's why the word sum is used). Some polynomials can be classified more specifically as monomials, binomials, or trinomials.

6 0
3 years ago
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