Rationalize the denominator. Assume that all variables represent positive real numbers.
A. 29
B. 
C. 4a
D. 
Answer: D
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Find the intersection.9x + 8y - 9z = -3, -7x - 5y + 7z = 10
A. x = 11t + 65, y = 0t + 69, z = -11t
B. x = 121t + 65, y = 0t - 69, z = -11t
C. x = -11t - 65, y = 0t + 69, z = -11t
D. x = 11t - 
, y = 0t + 
, z = 11t
Graph the function f(x) over the given interval. Partition the interval into 4 subintervals of equal length. Then add to your sketch the rectangles associated with the Riemann sum 
, using the indicated point in the kth subinterval for ck.f(x) = cos x + 3, [0, 2?], left-hand endpoint
A. 
B. 
C. 
D. 
Use the rules of exponents to simplify the expression. Use positive exponents to write the answer.
2
A. 
B. 
C. 
D. 
State whether the function is a polynomial function or not. If it is, give its degree. If it is not, tell why not.f(x) = x(x - 5)
A. Yes; degree 2 B. No; it is a product C. Yes; degree 0 D. Yes; degree 1