The circumference of a circle is 4π ft. find its diameter in feet

What is the inverse of the function f(x) = 2x + 1?

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?

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8