The sum of two seven-digit numbers is a
eight-digit number.

Ineed i do not understand i'm only 8

Labc is reflected across x = 1 and y = -3. what are the coordinates of the reflection image of a after both reflections?

The serenity and the mystic are sail boats. the serenity and the mystic start at the same point and travel away from each other in opposite directions. the serenity travels at 16 mph and the mystic travels at 19 mph. how far apart will they be in 3 hours?