Simplifying radical expressions: 3/sqrt(5)+4

We only have one day of school left but we need to finish a whole chapter in that one day so I need to learn this stuff tonight, ASAP! We are taking the test tomorrow! So here is my question: How do you do this??

Simplify the expression:
1) 3/(square root of 5)+4

[pka]

We only have one day of school left but we need to finish a whole chapter in that one day so I need to learn this stuff tonight, ASAP! We are taking the test tomorrow!
GOOD LUCK TO YOU.
Get a good night sleep. Just do your best.
And next time do your work everyday.