Question 1139874: If I have a 79.37% in a class with tests being worth 50%, what would I need to make on the next test in order to bring my grade up to atleast a 90%?
Answer by Theo(13342)   (Show Source):
You can put this solution on YOUR website! based on these numbers, i don't believe you'll be able to get an overall grade of 90%.
the test is worth 50% of your grade.
that means that 79.37% is worth the other 50% of your grade.
let x equal the grade you need on your first 50%.
your total grade will then be .5 * x + .5 * 79.37%.
since you want your total grade to be equal to 90%, then the equation becomes:
90% = .5 * x + .5 * 79.37%.
subtract .5 * 79.37% from both sides of the equation to get:
90% - .5 * 79.37% = .5 * x
solve for x to get x = (90% - .5 * 79.37%) / .5 = 100.63%.
unless you can get more than 100% on a test, you won't be able to get 90% overall grade because 100.63% is greater than 100%.
if you can't get more than 100% on a test, then the best you can do is .5 * 100% + .5 * 79.37% = 89.685%.
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