By expressing the total amount spent as a function and placing the value
of $75 as the amount spent, the number of balls to be bought can be found.
The entrance fee = $18
The price per paintball = $0.08
The promotion = $10 off when the total spent is $75
The number of paintball that is to be bought along with the entrance fee
to get the promotion.
Let x represent the number of paintballs Carolina needs to buy, we have,
the following linear function;
Therefore;
x = (75 - 18) ÷ 0.08 = 712.5
The value of x = 712.5 which is seven hundred and twelve and a half paintballs.
Given that half paintballs are not mentioned, an extra whole paintball is purchased to make the total paintballs = 713
The total amount = $18 + 713 × $0.08 = $75.04
Therefore;
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