Answer:
20:5 - If you're going to simplify it, do 20/5 which is 4/1.
Step-by-step explanation:
The simplified expression by rationalizing the denominator is (C).First we must simplify the expression:
Then we factor the rational parts and cancel it out:
Then we rationalize the expression:
<span>Finally, the simplified expression by rationalizing the denominator is (C)
.</span>
I believe the answer for 17 is C. 18 I am not sure how to do. For 19, however, the answer is B. Hope I help, and sorry I can't answer 18.