Answer:
39
Step-by-step explanation:
<u>Data</u>
- standard deviation (sd) = 2
The z-score is computed as follows:
z = (x - mean)/sd
where x is a value of interest, in this case, the missing data value. Replacing with data and solving for x:
-2.1 = (x - 43)/2
-2.1*2 + 43 = x
39 = x
1 ) 9 x + 18 > 9 x - 27
9 x - 9 x > - 27 - 18
0 * x > - 45
Always true
2 ) 6 x - 13 < 9 x - 12
6 x - 6 x < - 12 + 13
0 * x < 1
Always true
3 ) - 6 ( 2 x - 10 ) + 12 x ≤ 180
- 12 x + 60 + 12 x ≤ 180
0 * x ≤ 180 - 60
0 * x ≤ 120
Always true.
<span>Sales went from 48 pairs to 60 pairs:
total change = 60 - 48 = 12
percentage change = 12 / 48 = 0.25 = 0.25*100% = 25%
Answer: 25%</span>
Answer: 2
Step-by-step explanation:
-2 and 2 are the only available integers