Justin's boat travels 175 km downstream in 5 hours and it travels 189 km upstream in 7 hours. Find the speed of the boat in still water and the speed of the stream's current.

(V + W) * 5 = 175     boat traveling downstream

(V - W) * 7 = 189       boat traveling upstream

V + W = 35

V - W = 27

2 V = 62    

V = 31 = speed of boat

2 W = 8

W = 4    speed of water

Upstream  7 * (31 - 4) = 189

Downstream 5 * (31 + 4) = 175

7

step-by-step explanation:

i'm assuming you need to figure out how many campers go into each tent.

i got the answer by:

24+4=28

28/4=7  

"image"

step-by-step explanation:

in most of these problems, the notation is that the point with a "prime" is the image of the point without. that is, b' is the image of b.

here, there is no dilation or reflection. there is simply translation (with no direction shown). which figure you call the "preimage" and which one you call the "image" is up to you. as a matter of convention, the naming is as described above.