Question

I need help ASAP please (radical expressions)

Answer 1

Answer:

A. I only

Step-by-step explanation:

We need to start off by taking perfect squares out of these square roots.

Begin with the numerator. It looks like we can take 4 out of the radical:$\sqrt{40} = \sqrt{4*10} = \sqrt{4} * \sqrt{10} = 2 \sqrt{10}$

Now we have

$\frac{2\sqrt{10}}{\sqrt{10} }$

Looks like those $\sqrt{10}$s can cancel!

= 2

Plug those answers into your calculator. II and III don't equal 2, but I does. This makes sense when we consider the rule that if you're dividing two radicals, you can just pull the radical over the whole expression!

The answer is A. I only.