Mariana walked 3/10 mile to the park. Later, she walked 1/4 mile to a friend's house. Then she walked 2/5 mile home. How many miles did Mariana walk in all?

19/20 of a mile.

Step-by-step explanation:

The common denominator is 20 so we times the first one by 2 the second one by 5 and the last one by 4. (Both numerator and denominator.)

You will end up with this

y=x

Step-by-step explanation:

When the pentagon is reflected across y=x, all of its points are placed equally distant from the diagonal on one side as they are from the other. This causes the figure to turn 90 degrees instead of flipping like in any of the other reflections. Hope this helps!