Sumin
Sumin Sumin
  • 01-11-2016
  • Mathematics
contestada

50 (20-x) + 40x ≤ 300.
When x ≥ b.
Find b.
Thank you for your help!

Respuesta :

kaoook12
kaoook12 kaoook12
  • 01-11-2016
50(20-x) + 40x < 300
1000-50x+40x<300
1000-10x<300
-10x<300-1000
-10x<-700
multiply by -1
10x>700
x>70
b=0-70
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