A door alarm works in 72 out of 100 cases.
surveillance camera works in 68 out of 100 cases.
The probability that method A is used = 72/100
The probability that method B is used = 68/100
Since both method are used we find the probability of A and B
Probability ( A and B) = 
* 
= 
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x + 2x + 9y - 7y
3x + ( 9y - 7y )
3x + 2y
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Answer:
I don't know
Step-by-step explanation:
Answer:
multiplication property of equality
Step-by-step explanation:
The answer would be -7 n= -7 because a negative times a negative equals a postive
