What is the average of 140, 130, 144, 145, 130?

What does it mean by solve the exponential equation for x?

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 cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?