Hope this helps, the blue one is the reflection Over the x axis and the orange is the 180 rotation
Answer:
x=-2/15
Step-by-step explanation:
-5,4 would be in the quadrant 1<span />
A matrix is diagonal if

In other words, you want non-zero elements only when the indices of the row and the column are the same: the first element of the first row must be non zero, the second element of the second row must be non-zero, and so on. All other elements must be zero.