Estimate the answer by using front end rounding.
A. 9000
B. 8900
C. 10,890
D. 9100
Answer: A
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Use an identity to write the expression as a single trigonometric function or as a single number. 2 cos2 
- 1
A. - cos
B. cos
C. - cos
D. cos
Add.
+ 
A. 0
B. - 
C. 
D. 
Find the vertex, the y-intercept, and the x-intercepts (if any exist), and graph the function.f(x) = x2 + 2x - 8
A. 
Vertex (- 1, - 9);
x-int = (4,0) and (2, 0);
y-int = (0, -8)
B. 
Vertex (1, - 9);
x-int = (-2,0) and (4, 0);
y-int = (0, 8)
C. 
Vertex (1, - 9);
x-int = (-2,0) and (4, 0);
y-int = (0, -8)
D. 
Vertex (- 1, - 9);
x-int = (-4,0) and (2, 0);
y-int = (0, -8)
Perform the indicated operations.( 5x4 - 10x2 + 5x ) - ( 7x3 + 7x2 - 7x + 7)
A. 5x4 + 7x3 + 17x2 + 12x - 7 B. 5x4 - 7x3 - 3x2 - 2x + 7 C. 12x7 + 13x3 + 7 D. 5x4 - 7x3 - 17x2 + 12x - 7