Answer:
a)x=-10, b)x=7
Step-by-step explanation:
a)2x+6= x-4
x=-6-4= 10
b) 20x-18x= +8+6
2x/2=14/2= 7=x
5
2+2+1=5
-1.75.
The z-score = (n - m) / d where n is the value (13) m = mean and d = standard deviation.
= (13 - 20) / 4
= -1.75 (answer)
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15 days
Step-by-step explanation:360/24=15