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Wittaler [7]
3 years ago
5

What’s the value of n? 3^n=1/9

Mathematics
1 answer:
Pepsi [2]3 years ago
4 0

Answer:

n= -2

Step-by-step explanation:

3^n = 1/9

3^n = 1/(3^2)

3^n = 3^(-2)

n = -2

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find three consecutive odd integers such that the sum of the smallest number and middle number is 27 less than 3 times the large
katrin2010 [14]

A generic odd number can be written as

2k+1,\quad k \in \mathbb{Z}

Since there is an odd number every two numbers, three consecutive odd numbers will be

2k+1,\quad 2k+3,\quad 2k+5

Now let's make up the equations: the sum of the first two is

(2k+1)+(2k+3)

And 27 less than 3 times the largest is

3(2k+5)-27

These two must be the same, so we have

(2k+1)+(2k+3)=3(2k+5)-27 \iff 4k+4 = 6k+30-27 \iff 4k+4=6k+3

Subtracting 4k and 3 from both sides gives

1=2k \iff k=\dfrac{1}{2}

Which means that the problem has no solution.

To confirm this hypothesis, we can observe that, on the left hand side, we have the sum of two odd numbers, which is even

On the right hand side, we have an odd number, multiplied by 3 (still odd), take away 27 (still odd).

So, the left hand side is even, and the right hand side is odd. They can't be the same number.

7 0
4 years ago
Please help! <br><br> 6.2 divided by (2x + 1)= 2 1/3 divided by 4
guajiro [1.7K]

Answer:

x=2/3

Step-by-step explanation:

(2x+1)/2 = 2 1/3/4

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2x+1=2 1/3

Rewrite:

2x+1=7/3

Subtract 1 on both sides:

2x=4/3

Divide 2 on both sides:

x=2/3

Thus x=2/3

Hope this helps!

7 0
3 years ago
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bija089 [108]
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70/6=11.666666...
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The answer is 11 2/3.


hope i helped!! :))
6 0
3 years ago
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xxMikexx [17]
I think you can google this
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3 years ago
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0.9 _ 0.023 _ 3 over 20 _ 5 over 6 rename each as a percent
astraxan [27]
The first one would be 90%. the second one would be 2.3%. the third one would be 150%. and the final one will be 83.3333%.
5 0
3 years ago
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