SOLUTION: A student�s average is determined by 4 exam grades and a final that is worth twice as much as each exam. If a student has test grades of 84, 75, 75, and 72, what score will they ne

Question 880984: A student�s average is determined by 4 exam grades and a final that is worth twice as much as each exam. If a student has test grades of 84, 75, 75, and 72, what score will they need to receive on their final if they want to have an average of 80 for the course?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A student�s average is determined by 4 exam grades and a final that is worth twice as much as each exam. If a student has test grades of 84, 75, 75, and 72, what score will they need to receive on their final if they want to have an average of 80 for the course?
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Equation:
84 + 75 + 75 + 72 + x + x = 6*80
-------
306 + 2x = 480
2x = 174
x = 87
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Cheers,
Stan H.
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