Solve.x2 = 81
A. 40.5
B. -9, 9
C. -10, 10
D. 9
Answer: B
Mathematics
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Find a and b.If |x + 1| ? 2, then a ? 
? b.
A. a = 
, b = 
B. a = 
, b = 
C. a = 
, b = 
D. a = 
, b = 
Mathematics
Translate the problem to a system of equations, then solve using matrices.A merchant has coffee worth $40 a pound that she wishes to mix with 20 pounds of coffee worth $80 a pound to get a mixture that can be sold for $50 a pound. How many pounds of the $40 coffee should be used?
A. 40 lb B. 30 lb C. 80 lb D. 60 lb
Mathematics
Graph the inequality.y < 
x
A. 
B. 
C. 
D. 
Mathematics
Divide.(12x6y5 - 14x2y2 - 8x3y) ÷ (-2x2y)
A. -6x4y4 + 7y + 4x B. -6x4y4 + 7y + 4xy C. -6x4y5 - 7y2 - 4xy D. -6x4y4 - 7y - 4x
Mathematics