Answer:
The Z score of the person is -3.09.
Step-by-step explanation:
The standard normal deviate (Z) for a normal distribution is given by

where,
X = the value of observation
is mean of the observations and
σ = standard deviation of the score
Applying values we get

Answer:
1/18
Step-by-step explanation:
Just go to calculator and write -9÷54-(-12÷54)
Answer:
= -6
Step-by-step explanation:
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It means -1x - 2 = 3 those bars make all the number positive