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Jackie scored 82 and 88 on her first two quizzes. Write and solve a compound inequality to find the possible values for a third quiz score that would give her an average between 80 and 85, inclusive.

a. 80=<(82+88+n)/3=<85;70=<n=<85
b. 70=<(82+88+n)/3=<85;80=<n=<85
c. 80=<(82+88+n)/3=<85;70<n<85
d. 82=<(80+85+n)/3=<88;70=<n=<85

  • Math -

    80=<(82+88+n)/3=<85

    80*3 = 240
    82 + 88 = 170

    240</= = 170+n
    n>/= 70

    85*3 = 255
    n + 170 </= 255
    n </= 85
    so
    d

  • Math -

    Do your own work.

  • Math -

    Jeez @Alpha-Cure-Mom.... Jishka is here for help!

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