Step-by-step explanation:
the answer is in the above image
False
on the left, there is 2 negatives, which cannot result in a negative number on the right
Answer:
(z) + (z) + (z-1) + (z-1) = 4z-2
Step-by-step explanation:
Perimeter is the sum of all the sides
Answer: -2.10
Step-by-step explanation:
Given : 

Sample size : n= 50, since the sample size is greater than 30 , so we apply z-test.
Sample mean : 
Standard deviation : 
The test statistic for population mean :-

i.e. 
Hence, the value of the test statistic = -2.10