Answer:
8
Step-by-step explanation:
Unit per student = 4000/500 = 8
3 cheese burgers.
39
If x=1, then it's equal to 140/(1+9, or 10)+(1+4, or 5)^2, and that is equal to 140/10+5^2, or 140/10+25, and 140/10=14, and 14+25=39
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