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Linear Functions

SAT Math· difficulty 4/5

A salesperson's monthly income is \1500plusplus5%commissiononsales.Inonemonthsheearnedcommission on sales. In one month she earned$2400$. What were her sales?

  • A

    \12{,}000$

  • B

    \15{,}000$

  • C

    \18{,}000$

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  • D

    \20{,}000$

Explanation

1500+0.05s=2400⇒0.05s=900⇒s=18,0001500 + 0.05s = 2400 \Rightarrow 0.05s = 900 \Rightarrow s = 18{,}000.

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