Answer:
d
Step-by-step explanation:
Qualitative research involves mainly exploratory. It is used to gain understanding reasons,opinions and motivations.
Quantitative research is used to collect and generate numerical data used in defining and solving problems.
He should change the coefficient 5
Answer: 
Step-by-step explanation:

if it matters then simply further...
4 + \sqrt{4i} = 
2/3 n = -12 Write equation
(3/2) 2/3n = -12/1 (3/2) Isolate n
n = -36/2 Simplify
n = -18 Answer
Of what?\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\