Answer:
412
Step-by-step explanation:
You have to follow PEMDAS and solve the problem carefully.


Answer:
The first is equation the second is expression the third is expression and the fourth is equation
Step-by-step explanation:
equations have equal signs and expressions dont
If there are any three points on the graph that are not on the same line, the function is nonlinear. Such points might be ...
... (-5, 1), (-4, 0), (-3, 1)
I'm sorry I'm too lazy to read all of that. However, I did get the main point. The river was going at 3 mph. Since he wanted to travel 10 miles upstream and downstream, you would have to subtract 20 by 3. This would mean he was going at a speed of 17 mph.