Answer:
20
Step-by-step explanation:
16=1 2/10R + -8
16+8= 12/10R
24=12/10R
R=20
Polynomials are linear combinations of positive integer powers. For example,

is a polynomial, but

is not.
(In case you're unfamiliar with the term, a linear combination of two quantities is the sum of scaled versions of those quantities, e.g. a general linear combination of
and
is
, where
are any numbers.)
is not a polynomial; the offending term is
, or
.
It goes by 3s so I think its 1.2