Rewrite without absolute value sign for different values of x: y=− |2x+5| + |2x−5| if x<−2.5; if x>2.5; if −2.5≤x≤2.5

Me because some of question i don’t understand

Asequence {an} is defined recursively, with a1 = 1, a2 = 2 and, for n > 2, an = an-1 an-2 . find the term a241

You dug a hole that was 8 feet deep. after taking a short break, you dug down 3 more feet in the same hole. when finished digging, a tractor accidentally filled the hole with 4 feet of dirt. how deep is your hole now?