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Math·Algebra·Linear functions

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A carpenter charges a flat rate of $216 for the first 3 hours of work and $60 for each additional hour of work. Which equation gives the total amount $y$, in dollars, that the carpenter charges for $x$ hours of work, where $x>3$?

A

$y=60x+216$

B

$y=216x+396$

C

$y=60x+36$

D

$y=216x+60$