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jrfranckowiak
07.03.2021 •
Mathematics
I need help with question 5.Please show ur work! Thank you!
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Ответ:
1:3
Step-by-step explanation:
you can simplify both factors by 3 so 3:9 will be 1:3
Ответ:
Option 1 , Option 3 and Option 4 are correct.
Step-by-step explanation:
Number of customers using landlines decreases 10% per year.
Let x be the umber of customers using landlines in 2002.
⇒ Number of customer using landlines in 2003 =![x-\frac{10}{100}\times x](/tpl/images/1295/6869/df286.png)
=![x-0.1x](/tpl/images/1295/6869/4c7db.png)
= 0.9x
Number of customers using landlines in 2004 =![0.9x-\frac{10}{100}\times 0.9x](/tpl/images/1295/6869/b17a6.png)
=![0.9x-0.1\times0.9x](/tpl/images/1295/6869/2113f.png)
=![0.9x-0.09x](/tpl/images/1295/6869/85dc4.png)
=![0.81x](/tpl/images/1295/6869/048c0.png)
Therefore, from this Option 1 , Option 3 and Option 4 are correct.