Answer:
1
Step-by-step explanation:
GCF(18, a, 20ab) = 1
18 and <em>a</em> do not necessarily have any factor in common, so their GCF is 1. Adding more terms to the list will not increase the GCF beyond that value.
5 lines
hope this helps.
C.
$4.72
16.79+28.49=45.28
50-45.28=4.72
