<span>B = 9s2x If I am correct this should be the answer hope this helps</span>
Given:
second term = 18
fifth term = 144
The nth term of a geometric sequence is:

Hence, we have:

Divide the expression for the fifth term by the expression for the second term:

Substituting the value of r into any of the expression:

Hence, the explicit rule for the sequence is:
Y=2x-9
y=x-4
x-4=2x-9
+9 each side=
x+5=2x
-x each side=
5=x
flip for the final answer of x=5