An amount obtained as a result of subtracting numbers

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

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

What number line represents the solution set for the inequality -1/2 greater than or equal to 4