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telo118 [61]
3 years ago
7

Which of the following expressions represents "the sum of n and the sum of 8 and 6"?

Mathematics
2 answers:
Valentin [98]3 years ago
7 0
It would be n + ( 8 + 6 ) because n is separated from the addition of 8 and 6 as asked in the question.
zhannawk [14.2K]3 years ago
6 0

Answer:

n + (8+6)

Step-by-step explanation:

"The sum of n and the sum of 8 and 6" is telling us that we are going to sum up the numbers 8 and 6  (this would be 8 + 6) and then we are going to add n

So the correct answer would be n + (8+6)

1. (n + 6)8 is incorrect because this expression tells us that we are going to sum n plus six and then we are going to multiply the result by 8.

2. n (8 + 6) is incorrect because this expression tells us that we are going to sum 8 + 6 and then we are going to multiply the result by a number n.

Therefore the correct answer is n + (8 + 6)

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Answer:

The 4th one.  

Step-by-step explanation:

On all the tables x and y are always increasing, except for the 4th one where the y is decreasing.  

5 0
3 years ago
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For what percentage of time has life existed on earth (round to the nearest whole number).
abruzzese [7]
This is the concept of arithmetic. To calculate the percentage of time life has existed we proceed as follows;
According to history:
The age of earth is 4.6 billion years
the age of life is as it appeared from unicellular is 3.8 billion years.
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3 years ago
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A is the correct answer
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3 years ago
assume the substance has a half-life of 11 years and the initial amount is 126 grams.How long will it be until only 15 % remains
Mumz [18]
(126) times (1/2 to the x/11 power) = 15% times 126

(1/2) to the x/11 power = 0.15

Take the log of both sides :

(x/11) times log(1/2) = log(0.15)

Multiply both sides by 11 :

'x' times log(1/2) = 11 x log(0.15)

Divide both sides by " log(1/2) " :

x = 11 x log(0.15)/log(1/2) = <em><u>30.107 years</u></em> (rounded)

That's the time it takes for <em><u>any-size</u></em> sample of this substance
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5 0
3 years ago
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Vinil7 [7]

Answer:

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Step-by-step explanation:

Average rate of change: \frac{f(a) - f(b)}{a-b}

Simply plug in 6 for <em>a</em> and 2 for <em>b</em>

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