math

posted by .

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?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math

    A bond has an average return of 6.8 percent and a standard deviation of 4.6 percent. What range of returns would you expect to see 68 percent of the time?
  2. Math - average grade

    Does anyone know how to calculate average point grade?
  3. math

    If you have a grade average at 50% and you score 89% percent on a test what does your grade equal out to?
  4. Statistics

    I'm confused.Can someone tell me if I have done this correct.I'm trying to get the average using a weighted scale: TOTAL GRADES: WEIGHT 90% 5% 100% 15% 95% 15% 90% 5% 94.5% 60% I multiplied the total grade by the percent, then added …
  5. Math

    I'm confused.Can someone tell me if I have done this correct.I'm trying to get the average using a weighted scale: TOTAL GRADES: WEIGHT 90% ---------- 5% 100% ---------15% 95% --------- 15% 90% -----------5% 94.5% --------60% I multiplied …
  6. Math

    The percent grade of a highway is the amount that the highway raises or falls in a given horizontal distance. For example, a highway with a four percent grade rises 0.04 mile for every 1 mile of horizontal distance. a. How many feet …
  7. Math, Geometry

    The percent grade of a highway is the amount that the highway raises or falls in a given horizontal distance. For example, a highway with a four percent grade rises 0.04 mile for every 1 mile of horizontal distance. a. How many feet …
  8. Algebra

    In his mathematics class, John has taken 3 tests, each worth 20% of his total grade. His grades on those tests were 92%,83%,and 85%. He has an 100% average on his homework, worth 10% of his grade. All that remains is a final exam worth …
  9. Math, are they all right?

    1. A student raises her grade average from a 75 to a 90. What was the percent of increase in the student’s grade average?
  10. News for Ms. Sue

    1. A student raises her grade average from a 75 to a 90. What was the percent of increase in the student’s grade average?

More Similar Questions