Calculate the value of each expression below using a scientific calculator.  

1. $\frac{-10+\sqrt{25}}{ 5}$ 

2. $\frac{8+\sqrt{40}}{ 3\cdot3}$ 

   Hint (b):

   Calculate the square root and everything in the denominator before simplifying the rest of the expression.

3. $\frac{8+\sqrt{3^2+2\cdot3+1}}{-4}$ 

   Hint (c):

   Calculate everything inside the square root before simplifying.