31-10-2016
Mathematics

Answered

50 (20-x) + 40x ≤ 300.

When x ≥ b.

Find b.

Thank you for your help!

Verified Answer :

kaoook12 kaoook12

31-10-2016

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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