2+a/4=-1 invervse opperation

Samantha swam upstream for some distance in one hour. she then swam downstream the same river for the same distance in only 12 minutes. if the river flows at 4 mph, how fast can samantha swim in still water?

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5

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