Umi's test grades for this semester are in the list shown. The mean of her test grades is 82.4. 86,93,90,85,42,91,90

Her average for the semester is 82.42

Step-by-step explanation:

577 is the sum of all the points in the assignments

and dividing by 7 (the number of assignments) you get 82.42 ie her semester grade.

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb

the answer is: the length is 5/6 yards.

give me a or a 5 star rating if this is correct!

step-by-step explanation: