Answer:
x+21 y
Step-by-step explanation:
Answer=
y=-3+3
y=0
the sum of -3+3 is zero.
Answer:
Step-by-step explanation:
dont have a creative way but i just remember rise over run or 
hope this helps <3
Answer:
The margin of error (E) 
Step-by-step explanation:
Given,
mean 
standard deviation 
sample size 

Critical value


Critical value 


The margin of error (E) 


Hence, The margin of error (E) 
Complete question is attached in below.
Answer:
c
Step-by-step explanation: