Respuesta :
Answer:
C
Step-by-step explanation:
add the two x^2 parts = 10 x^2
so answer is B or C
add the constants 7 + 6 = 13 so answer C
Answer:
C. 10x²-x+13
Step-by-step explanation:
1. Add the numbers
x^2 - x + 7 + 9x^2 + 6
x^2 - x + 13 + 9x^2
2. Combine like terms
x^2 - x + 13 + 9x^2
10x^2 - x + 13
