If 0 < a < b and k = (2a + 5b)/b , which of the following must be true?
Choose the correct choice from the following choices:
A) k < 2	B) k < 7	C) k < 9	D) k > 9	E) k > 11
Here's another approach:   k = (2a + 5b)/b   = 2a/b + 5b/b   = 2(a/b) + 5   Since 0 &lt; a &lt; b, we know that a/b is less than 1, which means that 2(a/b) is some number less than 2.   So, we get k = (some number less than 2) + 5   From here, we can see that k must be less than 7   Answer: k &lt; 7
<result>B</result>
If 0 < a < b and k = (2a + 5b)/b , which of the following must be true?