I believe it is a 62.5 percent chance.
Y=1/5x is a linear function
0.35*3.6=$1.26 Zack will pay $1.26 lbs of bannas
Hope this helped :DD
Answer:
You can proceed as follows:
Step-by-step explanation:
Suppose that the matrix 
is invertible, and suppose that at least one of the matrices 
is not invertible. Without loss of generality suppose that the matrix 
is not invertible. Remember the important result that a matrix is invertible if and only if its determinant is nonzero. Then,
On the other hand, the determinant of a products of matrices is the product of the determinants of the matrices, that is to say,
But we supposed that is not invertible. Then 
. Then 
. This contradicts the fact that
and then the three matrices 
must be invertible matrices.
I think it is a because it shows us the points that the students made. I also think it is d. But I think it is mainly a.
-Dhruva;)
