The expression would be: y = x/2 - 4. And no. Because if Keenan started with 6 strawberries and gave half to Tisha she would have 3 strawberries not 4.
At start Keenan has x strawberries. He gives Tisha x/2. Then Tisha keeps 4 strawberries and gives Suvi the rest. If y is the number of strawberries that ...
I would say A. Advertisers tend to target their ads at a certain age group, and using different types of music can have a different appeal to a certain age group. If they want certain people paying attention to their ads, they'll most likely use a song from their generation.