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math

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if 40 percent of my grade is at a 97 percent average and 40 percent of my grade is at a 92 percent average and my final test is worth 20 percent of the grade then what do i have to score on my final test to have a grade of 91.5 percent or better?

  • math - ,

    let your final be x

    .4(97) + .4(92) + .2x = 91.5

    solve for x

    I get 79.5

  • math - ,

    It certainly pays to check your work! I just took a huge science test. I checked it over twice before I turned it in, and I got an A! My score was 94 out of 100! I figure that each time I checked it, I found half of the mistakes that were there at a time. What would have been my score if I had not checked my work?

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