SOLUTION: if a have 76 average on my class, what grade do i need on my final exam to get a B on the class, if the final is worth 30% of the grade. Assume the range for B is 80% to 90%.

Algebra ->  Average -> SOLUTION: if a have 76 average on my class, what grade do i need on my final exam to get a B on the class, if the final is worth 30% of the grade. Assume the range for B is 80% to 90%.      Log On


   

Question 931245: if a have 76 average on my class, what grade do i need on my final exam to get a B on the class, if the final is worth 30% of the grade. Assume the range for B is 80% to 90%.
Answer by TimothyLamb(4379) About Me  (Show Source):
You can put this solution on YOUR website!
(1 - 0.30)*76 + 0.30x = 80
0.30x = 80 - (1 - 0.30)*76
x = ( 80 - (1 - 0.30)*76 )/0.30
x = 89.333333333300004
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answer:
you need to get 90 on the final to get a B in the class
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