that's-- on edmentum isn't it?
first pair is -3
second pair is -2
third pair is 0'
and the last one is 5
that what i think it is .....????
Mr. Zorn had skated total 17 miles.
<u><em>Explanation</em></u>
The length of the exercise trail around the Westwood park is 3 miles.
Mr. Zorn is skating around the trail 5 and 1/2 times.
So, the distance skated in 5 times 
and the distance skated in 
of the trail 
Thus, the total distance he had skated will be: 
<em>(Rounded to the nearest mile)</em>
<span>let x be number of bicycles
and y the number of</span> tricycles<span>
So
x + y = 25 equation 1
The number of wheels is
2x + 3y = 63 equation 2
</span>We can multiply the equation 1 by two and subtract from the second one...
2x + 3y = 63
-(2x + 2y = 50)
then
y = 13 trikes and
x = 12 bikes
