emmettderp
emmettderp emmettderp
  • 04-07-2017
  • Mathematics
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i need help with 14 and 15

i need help with 14 and 15 class=

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mreijepatmat
mreijepatmat mreijepatmat
  • 04-07-2017
14) -5(x+1)>20;
-5x-5>20;
-5x>20+5;
-5x>25 ;
-x>5
& x< - 5

15-1) 2.5+y < 7.5
y< 7.5 - 2.5
y<5 (answer c)

15-2) y/18<1/6 (cross multiplication):
6y<18
y < 3 (answer d)

15-3) y-1.5> - 0.5
y> - 0.5 +1.5
y> 1 (answer b)

15-4) -1.5y<4.5
- y < 4.5/1.5
- y< 3
y> -3 (answer a)
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