Determine whether the pair of lines is parallel, perpendicular, or neither.y = 9 - xy = x + 9
A. Parallel
B. Perpendicular
C. Neither
Answer: B
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A delivery truck must deliver packages to 6 different store locations (A, B, C, D, E, and F). The trip must start and end at A. The graph below shows the distances (in miles) between locations. We want to minimize the total distance traveled.
How many different Hamilton circuits would we have to check if we use the brute-force algorithm? (Do not count the same circuit traveled backward.)
A. 6 B. 60 C. 15 D. 30 E. none of these
Write a fraction to represent the shaded portion of the figure.
A. 
B. 
C. 
D. 
Perform the indicated operation.
- 
A. 
B. 
C. 
D. 
Write a formula for the general term (the nth term) of the arithmetic sequence. Then use the formula for an to find a20, the 20th term of the sequence.a1 = - 
, d = 
A. an = 
n - 
; a20 = 
B. an = - 
n + 
; a20 = - 
C. an = - 
n + 
; a20 = - 
D. an = 
n - 
; a20 = 