Solve the polynomial inequality. Express the solution using interval notation.2x2 - 5x ? 7
A. (-?, -1] ?
B. 
C. (-?, -1) ? 
D. 
Answer: A
Mathematics
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Find 
.y = 5(cos-1 2x)2
A. 
B. 
C. 
D. 10 cos-1 2x
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Use an Euler diagram to determine whether the argument is valid or invalid.All birds have feathers.
Therefore, no mammals are birds.
A. valid B. invalid
Mathematics
Establish the identity.tan 2 u (1 + cos(2u)) = 1 - cos(2u)
What will be an ideal response?
Mathematics
Solve the equation by factoring.x(3x + 4) = 4
A. x = 0, 
B. x = 2
C. x = - 
, 0
D. x = -2, 
Mathematics