_____ 1. Simplify . Express your answer using only positive exponents. 

a.  

b.  

c.  

 

d.  

 

_____ 2. Simplify . Express your answer using only positive exponents.  

 

_____ 3. Evaluate  

a.  

b.  

c.  

d.  

 

_____ 4. When simplified and written with positive exponents, the expression  simplifies to 

a.  

b.  

c. x

d.  

Select the correct graph below of the function: (x) = x^3(x + 2)(x - 2)^2. List the x-intercepts. For each, state its multiplicity and why each either crosses the x-axis or simply touches the x-axis in terms of its multiplicity being odd or even. This problem is worth 8 points with 4 points for the graph selection and 4 points for the explanation of the intercepts.

Solve the system in Exercise 8b, on page 37, using inverses. Do you think this was less work than simply reducing the augmented matrix? Explain. X + 3y + z = 1 2x + 4y + 7z = 2 3x + 10y + 5z = 7