Question

Need more help - Attached image

Answer 1

Answer:

D. $10x^7 + 7x^5 -2x + 9$

Step-by-step explanation:

Like terms: $7x^7$ and $3x^7$ = $10x^7$

                  $5x^5$ and $2x^5$ = $7x^5$

                  $-3x$ and $x$ = $-2x$

                  $7$ and $2$ = $9$

The answer would be: $10x^7 + 7x^5 - 2x + 9$

Therefore, it is option D

Your Welcome! Vote me brainliest!!!

Answer 2

Answer:B

Step-by-step explanation: