Final grades are often computed using weighted averages. for example, fran's teacher uses the following: homework 10%, quizzes 20%, and tests 70%.
fran has an average homework score of 92. her quiz score average is 68, and her test score average is 81. what final grade can fran expect?
a) 73.5
b) 75.5
c) 78
d) 79.5

The final grade of fran can be calculated by multiplying the corresponding percentage of his average homework, quizzes and tests, then sum it up and it is now the final grade of fran.

Final grade = (0.10 x 92) + ( 0.20 x 68) + (0.70 x 81)

Final grade = 79.5 

f(2x−x2)=−3x2+6x−1

step-by-step explanation:

set up the composite function and evaluate.

f(2x−x2)=−3x2+6x−1