Question

Help with 16-25 Please.
a=12, b=9, c=4

Answer 1

16. Would be 144 + 9 - 16, which equals 137.
17. 81 + 24 - 16 = 89.
18. 8(12+9) = 168. 
19. 48 + 18 - 16 = 50
20. 144/ 36 + 4= 8
21. 16 (18-12)= 96.
22. 144 + 12 / 4= 39.
23. 128 - 108 /4= 5
24. 18-20= -2
25. 81 - 32 / 12 +4 -9= 7

Answer 2

its none of them..its actually -9