Find the geometric mean of 4 and 20

Kelli swam upstream for some distance in a hour.she then swam downstream the same river for the same distance in only 6 minutes.if the river flows at 5km/hr, how fast can kelli swim in still water?

2x + 3y = 17 5x + 6y = 32 usibg method if elimination

Analyze the diagram below and complete the instructions that follow. 600413 300 find the value of x and the value of y. a. x-2-2,-8 b. 1-2, y - 4/6 c. x-2-/2, 7-2-6 d. x-2/3, 7-63