Fill in the blank with one of the words or phrases listed below. 
Two lines are 
if the product of the slopes is -1.
A. slope-intercept
B. parallel
C. jointly
D. perpendicular
Answer: D
Mathematics
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Perform the indicated operations.(10x2 - xy - y2) + (x2 + 9xy + 5y2)
A. 11x2 + 8xy + 4y2 B. 11x2 + 10xy + 6y2 C. 9x2 - 10xy - 6y2 D. 10x2 + 9xy + 5y2
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Construct a truth table to decide if the two statements are equivalent.~(~q); q
A. True B. False
Mathematics
Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists.x + y + z= 7x - y + 2z=72x + 3z=14
A. {(- 
+ 7, 
, z)}
B. {(- 
+ 7, 2z, z)}
C. {(- 
- 7, 2z, z)}
D. {(- 
- 7, 
, z)}
Mathematics
Solve the problem.How many 6-symbol codes can be formed using 4 different symbols? Repeated symbols are allowed.
A. 4,096 B. 30 C. 360 D. 15
Mathematics