Can someone please help me

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

For the equations below which statement is true ? -2x=14 6x=-42

The dolphins at the webster are fed 1/2 of a bucket of fish each day the sea otters are fed 1/2 as much fish as the dolphins how many buckets of fish are the sea fed each day? simplify you answer and write it as a proper fraction or as a whole or mixed number