Olivia wants to have a 90 average in Algebra, where tests count for 55%, quizzes count for 30%, and HW counts for 15%. If she has a 92 test average and 100% HW average, what must her quiz average be? Let x = the average of the

The power of weighted average is noticeable with a final exam. Since the final exam usually carries more weight, this encourages students to work hard to improve their grade on the final exam.

Even if students got some bad grades in the beginning, they may still pass the class with a good grade if they ace the final exam.

This happened to me a lot and teachers love to see growth on a final exam and reward students as a result.

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2