Answer:
/
Step-by-step explanation:
firstly we make two steps to simplify this question.
1st step: simplify 
to simplify this we use factorization
.....(1)
2nd step:simplify 
.....(2)
now dividing (1) and (2), we get the answer
Answer:
the picture is black send another one
Answer: high test-retest reliability
Step-by-step explanation: this is because the result of the survey was thesame with the previous result, despite the space of time between when the first survey was conducted and when the second survey was conducted. There was know observable difference in result and if conducted in the next 3 months again, it will give same result, this strongly indicate that the survey has high test-retest reliability.
Step-by-step explanation:
4+6+5=15
15-1=14
2/14
1/7
