Question

You leave your house and walk for half an hour at a speed of 3 miles per hour. Then you run for 15 minutes at a speed of 7 miles per hour. You are now halfway to town. Write and solve an equation to find the distance from your house to town.

Answer 1

If you walk for half an hour at 3 mph, you will have walked 1.5 miles.
If you run for 15 minutes at 7 mph, you will have ran 1.75 miles.
These together is halfway, so the equation is
2 x (1.5 + 1.75) = d
Add 1.5 and 1.75 together.
2 x 3.25 = d
Multiply 2 by 3.25.
6.5 = d
It is 6.5 miles to town, hope this helps!