Given the system of equations. We have:
- For (5,0)
Substitute x = 5 and y = 0 in the equations:

Answer: No
- For (-7, -8)
x = -7 and y = -8

Answer: No
- For (3, -4)

This is satisfied for the first equation but not for the second. Therefore it is not a solution to the system.
Answer: No
- For (-2, -2)

Answer: No
Answer:
2/3
Step-by-step explanation:
So we have 10%+5%=15% of clients under the condition "permanent", and we can find the probability that a client in that group requested a haircut:
P(haircut | permanent)=10%/15%=2/3
Answer:
-35
Step-by-step explanation:
Multiply by 7 to get rid of the denominator.
2z=-70
divide by 2 to isolate z
z=-35