If 0 < a < b and k = (2a + 8b)/b , which of the following must be true?  Choose the correct choice from the following answers:  A) k < 2  B) k < 7  C) k < 10  D) k > 15  E) k > 11
Please follow posting guidelines (link in my signature) especially writing the correct topic title. Also do mention the source of the question if you select the tag:Source-Other Please Specify.   As for your question, it is very simple and straightforward with number plug in.   Assume a=1 and b=2 as a &lt; b, you get k = (2+16)/2= 
<gadget id="calculator">(2+16)/2</gadget>
<output>9</output>
9. This eliminates all but option k &lt; 10 , making it the correct answer.
<result>C</result>
If 0 < a < b and k = (2a + 8b)/b , which of the following must be true?