Find the exact value by using a half-angle identity.cos 22.5°
A. - 
B. 
C. - 
D. 
Answer: B
Mathematics
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Factor completely, or state that the trinomial is prime.9x2 + 12xy + 4y2
A. (9x + y)(x + 4y) B. (3x - 2y)2 C. (3x + 2y)2 D. (3x + 2y)(3x - 2y)
Mathematics
Provide an appropriate response.Explain how (p + q)2 differs from p2 + q2 by expanding (p + q)2.
What will be an ideal response?
Mathematics
For the given function f(x), find f-1(x).f(x) = 
A. f-1(x) = 
B. Not one-to-one
C. f-1(x) = 
D. f-1(x) = 
Mathematics
Solve the problem.A piece of molding 154 cm long is to be cut to form a rectangular picture frame. What dimensions will enclose the largest area?
A. 38.5 cm × 38.5 cm B. 30.8 cm × 30.8 cm C. 12.41 cm × 38.5 cm D. 12.41 cm × 12.41 cm
Mathematics