Answer
0.02x$^5$+2x$^4$-0.2x$^3$+0.2x+0.55
Work Step by Step
Group like terms together and then simplify.
(0.06x$^5$-0.2x$^3$+x+0.05)+(-0.04x$^5$+2x$^4$-0.8x+0.5)
(0.06x$^5$-0.04x$^5$)+(2x$^4$)+(-0.2x$^3$)+(x-0.8x)+(0.05+0.5)
0.02x$^5$+2x$^4$-0.2x$^3$+0.2x+0.55