Can anyone please help me with these sums? I need it fast.

Thanks,

What is the radical expression that is equivalent to the expression 27 1 over 5?

Suppose that sahil knows that 45 people with ages of 18 to 29 voted. without using a calculator, he quickly says then 135 people with ages of 30to 49 voted. is he correct? how might sohil have come up with his answer so quickly?

Use the distance formula to find the distance between (-3,5) and (3,1)