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Neporo4naja [7]
3 years ago
10

In 2005, 120 students at Lincoln High School

Mathematics
1 answer:
Mrrafil [7]3 years ago
3 0

Answer:

The average increase in the number of smart

phones per year is 45

Step-by-step explanation:

Given that :

Number of students who had phones in 2005 = 120

Number of students who had phones in 2010 = 345

(345 - 120) / 5

225 / 5

= 45

Hence, average increase in number of smartphones per year = 45

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Step-by-step explanation:

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\boxed{\green{= ( {x}^{a}  -  {3y}^{2b} ) \times ( {x}^{2a}  +  {3x}^{a}  {y}^{2b}  +  {9y}^{4b})}}

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