Add or Subtract as Indicated $\begin{array}{rr}7.1 u^{5}+9.2 u^{2} & -1.1 u+1.6 \\+-4.7 u^{5}+5.7 u^{3} & -8.4 u-1.7 \\\hline\end{array}$

Multiple Choice

Add or subtract as indicated. $\begin{array}{rr}7.1 u^{5}+9.2 u^{2} & -1.1 u+1.6 \\+-4.7 u^{5}+5.7 u^{3} & -8.4 u-1.7 \\\hline\end{array}$

A) $11.8 u ^ { 5 } - 5.7 u ^ { 3 } + 9.2 u ^ { 2 } + 7.3 \mathrm { u } + 3.3$
B) $2.4 u ^ { 5 } + 5.7 u ^ { 3 } + 9.2 u ^ { 2 } - 9.5 \mathrm { u } - 0.1$
C) $2.4 u ^ { 5 } + 9.2 u ^ { 2 } - 9.5 \mathrm { u } - 0.1$
D) $2.4 u ^ { 5 } + 1.6 u ^ { 3 } - 9.5 \mathrm { u } - 0.1$