Answer:

Step-by-step explanation:
Given


Required
Represent as an equation;

Expand the above

<em>Recall that b = $10 ----given</em>
becomes


His average speed is 634/13 = 48,77 miles/hour. Well, he's fast :D
I can't read it, it's too blurry! :( Sorry. Type what is says, If you want me to help! Sorry again.
Correct answer; A right angle