Answer:
D. [tex]7xy# < 18[/tex]
Step-by-step explanation:
[tex]4(0.5)(5) > 11.5[/tex] [tex]10 > 11.5[/tex] which is not true
[tex]9(5)+0.5 > 45.5[/tex] [tex]45.5 > 45.5[/tex] which is not true (they are equal)
[tex]5-2(0.5) < 3[/tex] [tex]4 < 3[/tex] which is not true
[tex]7(0.5)(5) < 18[/tex] [tex]17.5 < 18[/tex] which is true so the answer is D