Me quickly on this question! the given expression represents the area. find the side length of the square. hint: factor!

A^2 = A
so
a^2 = 100r^2 - 220 r + 121
a^2 = (10r - 11)^2
a = 10r - 11

answer

the side length of the square = 10r - 11

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.