Use the even-odd identities to find the exact value of the expression. cos (-60°)
A. 
B. - 
C. 
D. - 
Answer: C
Mathematics
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Find the vertex, the y-intercept, and the x-intercepts (if any exist), and graph the function.s(x) = -x2 - 2x - 1
A. 
Vertex (0, 1)
x-int = (1, 0), (-1, 0);
y-int = (0, 1)
B. 
Vertex (-1, 0)
x-int = (-1, 0);
y-int = (0, -1)
C. 
Vertex (1, 0)
x-int = (1, 0);
y-int = (0, -1)
D. 
Vertex (0, -1)
no x -intercepts;
y-int = (0, -1)
Mathematics
Find the difference.
- 
A. 
B. 
C. 
D. - 
Mathematics
Graph the conic section.y2 - 6y + 12x + 57 = 0
A. 
B. 
C. 
D. 
Mathematics
Solve the system for x and y using Cramer's rule. Assume a and b are nonzero constants.a2x + b2y = b2ax + by = a
A. 
B. 
C. 
D. 
Mathematics