Velocity is decreased by friction along the stream bed, so it is slowest at the bottom and edges and fastest near the surface and in the middle. A slower flow because there is more friction between the water and the stream bed. A smooth channel resulting in faster flow.

the topic of simplifying expressions which contain parentheses is really part of studying the order of operations, but simplifying with parentheses is probably the one part of the order of operations that causes students the most difficulty. this lesson is meant to provide a little extra in this area.

step-by-step explanation: