Step-by-step explanation:
5 computers = $140
10 computers = $200
15 computers = $260
Common difference = $60 for every 5 computer, $12 for 1 computer.
let cost of x no of computers be c.
forming an equation,
c = (x - 5) x 12 + 140
hence, to ship 84 computer,
c = (84 - 5) x 12 + 140
c = 1088
thus answer is option B.
Topic: Algebraic equations + patterns
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