
has critical points where the derivative is 0:

The second derivative is

and
, which indicates a local minimum at
with a value of
.
At the endpoints of [-2, 2], we have
and
, so that
has an absolute minimum of
and an absolute maximum of
on [-2, 2].
So we have



Speed=distance/time=80/5=16ft/s
You first need to isolate either x or y. since in one formula has both x and y in it and there is one with only y, you should solve the smaller one first then plug and chug
If this is division for a remainder then your answer should be 1r9 but if its not with a remainder i have no idea