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madreJ [45]
4 years ago
15

PLEASE HELP IVE BEEN STUCK ON THIS QUESTION FOR 20 MINS IDK :(

Mathematics
1 answer:
steposvetlana [31]4 years ago
3 0
Remember
\frac{x^m}{x^n}=x^{m-n}
and
if a^b=a^c where a=a, then b=c
so
\frac{7^9}{7^n}=7^{9-n}=7^3
7^{9-n}=7^3
so
9-n=3
-n=-6
n=6

answer is 6
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Answer:

5/2=2.5, while 1/3= aprox 0.333, therefore 5/2 is not equal to 1/3.

Step-by-step explanation:

Here is the long division table for 5/2

 2. 5 0 0

2 5. 0 0 0

− 4      

 1 0    

− 1 0    

   0 0  

 −   0  

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Here is the long division table 1/3 ( to three decimal places)

0. 3 3 3

3 1. 0 0 0

− 0      

 1 0    

−   9    

   1 0  

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     1 0

   −   9

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An easier way to do 5/2 is to think of 50/2, which is 25, and then add a decimal point, making it 2.5.

An easier way to do 1/3 is to think of it as one third (of one), or 0.333 repeating.

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