Clara forgot to distribute the - sign to- (2b-r) through all the terms the answer would be 6b+3r
6.4 is the answer that is the answer
The original area of a face would be a^2. Now that you added b to the edge, the new area of each face would be (a+b)^2. To find how much the are increased, subtract a^2 from (a+b)^2. 
So the answer is b(2a+b)
You know that -3 is the Y intercept(vertical graph line) and then continue 2/1 every x value that is plugged in.
D is the answer because in total she has 12 shirts and 3 out of the twelve shirts are white. so find the percentage of 3/12 which i belive is 1/4
