Aparabola intersects the x=3 and x=9 what is the x-coordinate of the parabolas vertex?

What is the solution of the systems of equations? y=2/3x+3 x=-2

Convert 2000 swiss francs to dutch guilders

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