Please help I need this quick Thank You! Write an expression for each of the following word problem

Priya has some money to spend at a fair. It costs $6to get in and $0.50 per ride ticket. Write an expression to represent how much Priya spends at the fair, in dollars. Let x represent the number of ride tickets Priya buys.

Select light for the type of wave, adjust the wavelength so that the light is red, and increase the amplitude of the light to the max. then, select the start button at the source location to begin producing the waves. light is a form of electromagnetic wave, containing oscillating electric and magnetic fields. the wave amplitude detector mentioned above shows how the electric field oscillates in time at the location of the probe. the amplitude of the wave at the location of the probe is equal to the maximum electric field measured. how does the amplitude of the wave depend on the distance from the source?