A radio station dedicates 20% of their air time to commercials for each radio show. During a radio show, 30 minutes of commercials is played. How long was the radio show?

Can someone me with my hwplz(only the circled ones)

Which point on the x-axis lies on the line that passes through point c and is parallel to lino ab?

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?