Question 72198
Problem #32
Directions: simplify by combining like terms. 
sqrt 63 - 2sqrt 28 + 5sqrt7 

ans = sqrt(7*9)- 2sqrt(4*7)+ 5 sqrt(7)
    = 3 sqrt(7)-4 sqrt(7)+5 sqrt(7)
    = 4sqrt(7)

Problem # 50 
Directions: Find the perimeter of the triangle shown in the figure. 
the triangle has for the hypotenuse leg= 4
height leg = sqrt 5 - sqrt 3
base leg = sqrt 5 + sqrt 3

answe is 2sqrt5 + 4