group the 1st 2 terms and last 2 terms:
(Z63 -2z^2) + (9z-18)
factor out GCF:
z^2(z-2) + 9(z-2)
now factor the polynomial:
(z-2) (z^2+9)
You can fill up 4 tanks because 20 divided by 5 is 4
Answer:
Step-by-step explanation:
Let the original number = x

x=98.0
x=98