If you mean the quotient of m divided by 7, then it should be m/7, because it is in its most simplified form.
D. There was a sharp softness...
an oxymoron is a figure of speech in which opposite terms appear
It is an acronym for a German car. Bayerishe Motoren Werke
The authors purpose suggested by the text is explain how to use the guitar because it's not trying to convince you to buy a guitar and it isn't teaching you about all the parts on the guitar just how to tune the strings. Hope you found this helpful!