Answer:
total sample space is 91
no of cookies in dog shape is 30
therefore
p(d)=30/91
50 People played an instrument. Every 10 people is represented as a 1 in the fraction. 5=50
Answer:
7
9
Step-by-step explanation:
key is the number of letters in each word
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.