Question

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Answer 1

5 hours each week = 5x
for the next 8 weeks , x = 8
so total video game time is 40 hours for the 8 weeks.
f(x) = 5x ; x <=8
5 represents the number of hours per week
and x represents the number of weeks
x<= 8 means
that only up till 8 weeks he can play 5 hours each week.

Answer 2

well x is less than or equal to 8 , its a restriction for those 8 weeks only.