Answer:
Step-by-step explanation:
1 h 25 min×3=3hr 75 min=4hr 15 min(1 hr=60 min)
A 21 inch per side square has an equation of 21 in x 21 in. That would be equal to an area of 441 in^2.
It takes 40 minutes more going up or 40/60 = 0.67 hours
more.
Let us say that:
t = the time required for him running down
t + 0.67 = time required for him running up
Since the distance of running up and down must be equal
therefore:
(3 miles / hr) * (t + 0.67) = (5 miles / h) * t
3 t + 2.01 = 5 t
2 t = 2.01
t = 1.005 hr
So the total length of the hike is:
length = 2 * (5 miles / hr) * (1.005 hr)
<span>length = 10.05 miles</span>
Distribute the negative through the second set of parenthesis.
-2x + 10 + 6x - 5y - 12 + x + 8y - 16
Gather like terms
-2x + 6x + x -5y + 8y + 10 - 12 - 16
5x + 3y -18