Write a word problem that you can solve by multiplying a mixed number by a whole number. include a solution

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?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Lines a and b are perpendicular. if the slope of line a is 3, what is the slope of line b?