For

to be continuous at

, we need to have

Note that

means that

, but that

is *approaching* 5. We're told that for

, we have

We can write

and the limit would be

and so

is discontinuous.
58+24=82 is the correct answer to that question because you subtract 2 from 60 then add that to 6 multiplied by 4
Set 500 to sum of distances traveled by both cars.
3000 + 70 + 2
It's basically everything that is added to get that number. You do not need a 100's place because a 0 is holding that spot.