The Phase Shift is how far the function is shifted horizontally from the usual position.
The answer would be -37.5
Answer:

Step-by-step explanation:
The 10 represents the speed traveling downsteam while the 3 represents speed upstream. Downstream you have the help of the current, so it would be x + 2, upstream you are working against the current so it would be x - 2.
Is there anyway you could reupload the picture or write it on paper so we can see the full question ? (:
Answer:
the triangle is not a right angle
Step-by-step explanation:
5²+12²=169
15²=225