Subtract.-4.5 - (-3.9)
A. -0.6
B. 8.4
C. 0.6
D. -8.4
Answer: A
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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.6x2 - 5
xy + y2 - 4
x + 8y = 0
A. v2 + 2
u + 6v = 0; Parabola
B. 
u2 + 
v2 + 2u + 6v = 0; Ellipse
C. -
u2 + 
v2 + 2
u + 6v = 0; Hyperbola
D. 
u2 + 2v2 + 6u + 2
v = 0; Ellipse
Solve the problem.A water trough has a semicircular cross section with a radius of 0.25 m and a length of 5 m (see figure). How much work is required to pump water out of the trough when it is full? Round to two decimal places when appropriate.
A. 12,250 J B. 255.21 J C. 61,211.72? J D. 510.42 J
Plot the point having the given polar coordinates.
A. 
B. 
C. 
D. 
Multiply and simplify.
? 
A. - 
B. 
C. 
D. -12