Answer:
<h2>Zero</h2>
Step-by-step explanation:

Y= $0.59(x)
y= $0.59(12)
y=?
y is the total
x is the amount of pen
so you multiply the cost of each pen with the amount of pens
$0.59 times 12
Answer:
18
Step-by-step explanation:
21-n; n=3
Substitute n for 3:
Solve.
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