Solve the inequality and give the solution set.|x + 9| < 0
A. {x|-9 < x < 9}
B. {x|x < -9 or x > -9}
C. 
D. ?
Answer: D
Mathematics
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÷ 1
A. -2
B. -2
C. -2
D. -3
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Solve for the specified variable. Assume that all other variables are nonzero.S = ?(b2 + B2)w; for b
A. b = ± 
- B2
B. b = ± 
C. b = ± 
D. b = ± 
- B
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Decide whether the figure is convex or concave.
A. Convex B. Concave
Mathematics
Solve the equation.16t - 15 = 4t - 3
A. 
B. 
C. 
D. 
Mathematics