31) each test grade in sara's science class counts for 1/6 of the final grade. the final exam counts for 1/2. sara's test scores are 72, 84, and 90. her final exam score is 90. what is sara's final grade for the class?

Add up all of the first three scores and divide them by 3.
You should get 82.
Then do 82+90 and divide that by 2
You should get 86.
86 is your answer

A)26•2=52there are 2 sides with the same length116-52=64the other 2 side have to be half of 64 each64/2=32the width is 32b)make two sentences about these steps because your teacher knows how you write and explain things.