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Linear Inequalities in One or Two Variables

SAT Math· difficulty 4/5

A student needs at least 85 average over 4 tests. With first 3 scores 80, 88, 92, what minimum score ss on test 4?

  • A

    8484

  • B

    8080

    check_circle
  • C

    8080

  • D

    7878

Explanation

(80+88+92+s)/4≥85⇒260+s≥340⇒s≥80(80 + 88 + 92 + s)/4 \ge 85 \Rightarrow 260 + s \ge 340 \Rightarrow s \ge 80.

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