Norris can row 3 miles upstream against the current in the same amount of time it takes him to row 5 miles downstream with the current. Solve the system {r−c=3r+c=5
for r, his rowing speed in still water. Then solve for c, the speed of the river current.

5. which description does not guarantee that a quadrilateral is a squar ajo is a parallelogram with perpendicular diagonals 0% has all sides congruent and all angles congruent o has all right angles and has all sides congruent 10% is both a rectangle and a rhombus 30%