Find the direction angles of each vector. Round to the nearest degree, if necessary.v = -2i + 3j - 4k
A. ? = 119°, ? = 43°, ? = 166°
B. ? = 115°, ? = 51°, ? = 147°
C. ? = 113°, ? = 55°, ? = 140°
D. ? = 112°, ? = 56°, ? = 138°
Answer: D
Mathematics
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Perform the indicated operation. Assume that all variables represent nonnegative real numbers.4
- 3x 
A. Can't simplify
B. 4 
- 2x 
C. x
D. 2x 
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Solve the polynomial inequality and graph the solution set on a number line.(x - 7)(x + 6) > 0
A. (-6, 7)
B. (-6, ?)
C. (-?, -7) ? (6, ?)
D. (-?, -6) ? (7, ?)
Mathematics
Find the solution set of the system
a. (3, -2) b. (3, 5) and (2, 0) c. (3, 5) and (-2, 0) d. No real solution
Mathematics
Simplify the expression and combine like terms.5p2 + 7p3 - 9p2 - 5p3
A. -4p2 + 2p3 B. -2p2p3 C. -2p2 D. 12p2 - 14p3
Mathematics