SOLUTION: If i have a 69 in my class and my final exam counts for 20% of my grade, what do i need to get on the test to make a 77 or higher in the class?

Question 614992: If i have a 69 in my class and my final exam counts for 20% of my grade, what do i need to get on the test to make a 77 or higher in the class?
Answer by Theo(13342) (Show Source): You can put this solution on YOUR website!
you have a 69 which represents 80% of your grade.
the final represents 20% of your grade.
69 * .80 + x * .20 = 77
simplify to get:
55.2 + .20x = 77
subtract 55.2 from both sides of the equation to get:
.20x = 77 - 55.2 which results in:
.20x = 21.8
divide both sides of the equation by .20 to get:
x = 21.8 / .20 = 109.
you need a 109 on the final to make at least 77 in the class.

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