If a and b are two rational numbers which expressions are equivalent to a -b? mark all that apply.

What is the reflection image of (5,-3) across the line y = -x?

Will mark brainlist what is the slope of the line passing through the points (-2, -8) and (-3,-9)? -7/5-5/71-1

Kelli swam upstream for some distance in a hour.she then swam downstream the same river for the same distance in only 6 minutes.if the river flows at 5km/hr, how fast can kelli swim in still water?