The total money Nathaniel would pay is $46.50.
If xx snacks are bought, the total money Nathaniel would pay is $36 + $3.50xx.
The total amount of money spent by Nathaniel at the movies is the sum of the cost of the movie tickets and the cost of the snacks.
Total cost = ( cost of movie ticket x number of people who went to the movies + (cost of snacks x number of snacks bought)
Total cost = ($12 x 3) + ($3.50 x 3)
$36 + $10.50
= $46.50
If xx snacks are bought, total cost is: ($12 x 3) + ($3.50 x xx)
$36 + $3.50xx
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