Which is equivalent to 4 square root 9 1/2x? a) 9 2x b) 9 1/8x c) square root 9x answer fast!

Zoee:  Here's a case where parentheses are badly needed to clarify this post.  I am unsure of whether you mean 4*sqrt(9)/2x, or 4*sqrt(19/2)/ x or something else.

All I can do here is work backwards from the given possible answer "sqrt(9x)".  That could be simplified to "sqrt(9)*sqrt(x)", which equals 3*sqrt(x).  Not very helpful.

So, Zoee, at this point I recommend that you share an image of the original problem.  Could you take and share a screen shot?  Only with the original problem in mind could I help you meaningfully as you try to express the problem and its possible solutions.