Answer:
$162
Step-by-step explanation:
12% of $75 is $9 Therefore,
$9 x 18 = 162 ( 18 being the years )
Hope this helps!!!
-Conrad
<span>2+4+12+16=34 COINS TOTAL.
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You didn't include any graphs but what you're looking for is a solid vertical line on x = 18 or the ordered pair (18, 0) where the whole left side of the line is shaded.
EDIT: I said whole left side of the graph; changed it to "line"
you can work it out or put in random numbers until the two sides are equal