Find the angle between the planes.3x - 8y - 8z = 9and- 4x + 2y - 9z = 4
A. 0.955
B. 0.383
C. 1.460
D. 1.187
Answer: D
Mathematics
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if 
and 
A. 
B. 
C. 
D. 
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Simplify.
A. - 
B. 
C. 
D. - 
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Factor the expression completely.x2 + 15x + 56
A. (x + 7)(x + 8) B. (x - 7)(x + 8) C. (x + 56)(x + 1) D. (x - 7)(x - 8)
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