How are unit fractions like base-ten units

What is the binomial expansion of (2x-3)^5

One month, a music site observed that 60% of the people who downloaded songs from its site downloaded q sam's latest single. the equation below represents this information, where x represents the total number of people who ddownloaded songs from the site that month: x = 0.6x + 384 how many people who downloaded songs from the site that month downloaded q sam's latest single?

Average acceleration: i have no idea how to do this.