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kallee10
18.12.2020 •
Mathematics
Solve the equation by factoring x^2 +5x + 6
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Ответ:
Step-by-step explanation:
1. on 2008 it was 9 and on 2009 it was 4, so amount of change is 9-4 = 5
2. percentage change;
9 = 100%
4 = x
x = 4×100/9 = 44.4% change
3. on 2010 it was 13 on 2011 it was 8
change = 13-8 = 15
4. percent
13 = 100%
8. = x
x = 8×100/13 = 61.5%