A pair of basketball shoes originally priced at $120.00 was markdown by 10%. Explain in writing (typing) how to find the amount of the markdown then explain how to find the new price for the shoes.

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

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?