<s>[INST] What is the sum of $4\sqrt{28}$ and $3\sqrt{7}$ ? As far as I can simplify it - 
$$4\sqrt{7*4} + 3\sqrt{7} 
= 8\sqrt{7} + 3 \sqrt{7} 
= \sqrt{7} * 11$$
However , The options for the correct answer are -
A) $ 8/3$
B)  $ 16/3$
C) $ 18/3$
D) $24/3$
I am a ninth grader so please try to explain in simple terms .
 [/INST] I think there was a misprint , most probably they meant -  $$\dfrac{4\sqrt{28}} {3\sqrt{7}} 
= \dfrac{8\sqrt{7}}  {3\sqrt{7}} 
= \dfrac83 $$
In this case , the answer would be A) 8/3 
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