Energy through ecosystems, while matter is . flows, recycled

flows, flows

recycled, recycled

recycled, flows

The sum of two numbers is 86, and their difference is 20. find the two numbers

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

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?