Respuesta :

Answer:

(Did the second and third picture)

16. 9

17. 132

18. 56

19. 110

20. -36

21. -22

22. 9x+9x (18x)

23. 4a+2a (6a)

24. qx-q7

25. -25

1. 9+6=6+9; 15=15; true

2. 21÷7=7÷21; 3=0.3 repeating; false

3. 10-4=4-10; 6=-6; false

4. (5+3)+8=5+(3+8); 16=16; true

5. (9-4)-2=9-(4-2); 3=7; false

6. 4+5x

7. 6×9

8. 2x+3y

9. 40×15

10. bc+a

Step-by-step explanation:

No Step-by-step explanation today unless if you ask for certain problems to be explained.

Answer:

16. 917. 13218. 5619. 11020. -3621. -2222. 9x+9x (18x)23. 4a+2a (6a)24. qx-q725. -251. 9+6=6+9; 15=15; true2. 21÷7=7÷21; 3=0.3 repeating; false3. 10-4=4-10; 6=-6; false4. (5+3)+8=5+(3+8); 16=16; true5. (9-4)-2=9-(4-2); 3=7; false6. 4+5x7. 6×98. 2x+3y9. 40×1510. bc+a