Answer:
x = 8
Step-by-step explanation:
y = -8, x = -2 (Given)
y = 4x
-8/-2 = 4
Answer:
Step-by-step explanation:
Given that A is a square matrix and A is idempotent

Consider I-A
i) 
It follows that I-A is also idempotent
ii) Consider the matrix 2A-I

So it follows that 2A-I matrix is its own inverse.
Answer:

Step-by-step explanation:

First ,0.75
Second, 60%
Third , 0.2