Answer:
4 mph
Step-by-step explanation:
The speed downstream is (28 mi)/(2 h) = 14 mph.
The speed upstream is (18 mi)/(3 h) = 6 mph.
The speed of the current is half the difference of these:
(14 mph -6 mph)/2 = 4 mph
_____
The current adds to the downstream speed and subtracts from the upstream speed, so the difference of those speeds is twice the current's speed.
2: add 4
3: 6
5: multiply by 2
6: 7
your study guide can be stuck up you know where :3
A
imagine the shape is flipped and standing up. that's how you can compare both images.
