Solve the quadratic equation by completing the square.x2 + 8x - 64 = 0
A. -4 ± 4
B. -8 ± 4
C. 4 ± 4
D. -4 ± 16
Answer: A
Mathematics
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Use the accompanying graph of y = f(x) to sketch the graph of the indicated equation.y = - 
f(x)
A. 
B. 
C. 
D. 
Mathematics
Verify the identity.
= cos 2x
What will be an ideal response?
Mathematics
Evaluate the expression for the given values of x and y.17 ? 
when x = 21 and y = 7
A. 
B. 
C. 357
D. 51
Mathematics
Evaluate
using the formula from this section.
?
?
A. 11 B. 1 C. 55 D. 165 E. 330
Mathematics