Respuesta :

Answer: 9

Step-by-step explanation:

15c+3d=

15(1)+3(-2)=

15+(-6)=9

Answer:

9

Step-by-step explanation:

[tex]15c + 3d \\ \\ = 15 \times 1 + 3 \times (-2) \\ \\ = 15 - 6 \\ \\ = 9[/tex]