Answer:
a.
Step-by-step explanation:
$16 per square foot
39
-3x(-13) = 39.
If this question was asking for something different I apologize.
y = 10.36
y - 1.6 = 8.76
add 1.6 to both sides
y - 1.6 + 1.6 = 8.76 + 1.6