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math

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on 3 tests you earned grades of 88%,94%,and 90%. Each test worth 150 points. The finalo exam is worth 250 points. How many points do you need on the final exam to earn 93% of the total points on tests? What percent do you need on the final?

  • math - ,

    . 88(150)+.94(150)+.90(150)+x(250)=.93(700)
    132+141+135+x(250)=651
    408+x(250)=651
    x(250)=243
    x=.972
    Or you need 243points to earn a 97.2 percent

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