Solve the system using the graphing method. 2x + y = -4 5x - 2y = -37
A. {(1, -6)}
B. {(5, 6)}
C. {(-5, 6)}
D. {(-5, -6)}
Answer: C
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Rotate the coordinate axes to change the given equation into an equation which has no cross product (xy) term. Identify the graph of the equation as a hyperbola, ellipse, parabola, a straight line, or parallel lines.xy - 9x + y - 6 = 0
A. 
u2 - y'2 - 4
u + 
v - 6 = 0 ; Hyperbola
B. 
u2 + 
v2 - 4
u + 5
v - 6 = 0 ; Ellipse
C. 
u2 - 4
u + 5
v - 6 = 0 ; Parabola
D. 
u2 - 
v2 - 4
u + 5
v - 6 = 0 ; Hyperbola
A ladder 25 feet long forms an angle 65 degrees with the ground. How far up the building does the ladder touch?
What will be an ideal response?
Use a double-angle identity to find the exact value of the expression.
A. 
B. 
C. 
D. 
Estimate the sum or difference by rounding each number to the nearest ten.
A. 720 B. 718 C. 710 D. 700