HELP ASAP: Write an equation to represent the hanger.

During a bike challenge riders have to collect various colored ribbons each 1/2 mile they collect a red ribbon each eighth mile they collect a green ribbon and each quarter mile they collect a blue ribbion wich colors of ribion will be collected at the 3/4 markrer

If the probability of an event happening is 65% then the probability this event does not occur?

Jeremy wants to determine the number of solutions for the equation below without actually solving the equation.