A group of friends went to lunch. The bill, before sales tax and tip, was $35.25. The group then tipped 18% on the amount after the sales tax was added. A sales tax of 7.5% was added.

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 w = 6 units, x = 3 units, and y = 5 units, what is the surface area of the figure? 168 units2 240 units2 144 units2 96 units2

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?