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Linear Equations in One Variable

SAT Math· difficulty 4/5

For revenue R(x)=50xR(x) = 50x and cost C(x)=200+30xC(x) = 200 + 30x, what is the profit when x=30x = 30 items?

  • A

    \600$

  • B

    \300$

  • C

    \400$

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  • D

    \500$

Explanation

Profit =50(30)−(200+30⋅30)=1500−1100=400= 50(30) - (200 + 30 \cdot 30) = 1500 - 1100 = 400.

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