Answer:B
Explanation:
Substitute!
3(4)+4=8 is incorrect because 3x4=12 and 12+4 doesn't equal 8
2(4)+8=40 is incorrect. 2x4 is 8. 8+8 doesn't equal 40
4(4)+4=12. is incorrect 4x4= 16. 16+4 doesn't equal 12
Therefore 5(4)-2 is correct. 5x4 is 20 and 20-2 is 18