Answer:
because coins are more portable
Step-by-step explanation:
6
28
f(n)=34, f(n-6)=34-6
=28
(2, -6)
5n^2+20n-60
(5n+30)(n-2)
5n + 30 = 0
5n = -30
(5n = -30)/5
n = - 6
n - 2 = 0
n = 2
answer: (2, -6)
