Calculate the discriminant to determine the number of real roots.
y=x^2+3x+9
how many real roots does the equation have?
a) no real roots
b) no solution to the equation
c) one real root
d) two real roots

D = b^2 - 4ac = 3^2 - 4*1*9 
                       =   9 - 36 = -27

because its negative there are no real roots 

just 2 imaginary roots

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's