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Answer:</h2>
This system can be solved for x by elimination.

Now, with what we found for x, we plug it back into one of the equations to solve for y. I chose the second one.

Now, we have our solution.

The correct answer to your question is no solution
Wait what logo are you talking about? I don't understand .-.
Average speed = 2.5 miles
Divide 6 from both sides.
6/6 = 1
15/6 = 2.5
So, overall Mark walks 2.5 miles per hour.
hope it helps!