Need help with 3x + 4x

will mark branlist

Write an equation of the line that passes through 9,2 and is parallel to the line y=5/3x+9

Petes dog weighed 30 pounds it then lost 16% of it's weight how much did pete lose

Michael gose to a theme park and rides two different roller coasters that both begin on a raised platform his height while on the first roller coaster measured in feet from the platform height can be modeled by the following graph where t is the number of seconds since the ride began