Seudónimo Seudónimo
  • 11-04-2017
  • Mathematics
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Help me on all these questions (picture added)

Help me on all these questions picture added class=

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Аноним Аноним
  • 11-04-2017
7. -9
8. -10
9. -60
10. -70
11. 300
12. -145
13. -1650
14. -1000
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