Answer:
2.3
Step-by-step explanation:
Put 9 in for b
N=9-4
N=5
81.6
y=1.25x+5
Not Always
example:
Yes:
12 - 4 + 20 - 16 - 32
32 - 48 = -20
No:
23 - 8 + 21 - 7 + 2 - 6 = 25