The sum of two numbers is 11. the sum of their squares is 65. find the numbers. (how do you get the answer? )

Well there is two different ways to find the answer there is the mathematical way( with an expression) or there is an easier way my way is the easy way 

First, you find the numbers that add up to 11
1 + 10
2 + 9
3 + 8
and so on
then you have to square them 
7 + 4 is the numbers that you are going to use for this question 
7^2 =49
4^2 = 16
49 + 16 = 65
so your answer is 7^2 + 4^2 = 65

Its equal to d=7.07in

What's the denominator