Find the difference.7 - 9
A. 16
B. 2
C. -16
D. -2
Answer: D
Mathematics
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Subtract.-24 - 21
A. 3 B. 45 C. -3 D. -45
Mathematics
Solve the problem.Find the image of the given figure under a reflection across the line m.
A. 
B. 
C. 
D. 
Mathematics
Find the exact value of the expression.cos 40° cos 20° - sin 40° sin 20°
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.A woman walks 100 yards eastward along a straight shoreline and then swims 30 yards southward into the ocean on a line that is perpendicular to the shoreline. Using her starting point as the pole and the east direction as the polar axis, give her current position in polar coordinates. Round the coordinates to the nearest hundredth. Express ? in degrees.
A. (11.40, -16.70°) B. (104.40, -88.28°) C. (104.40, -16.70°) D. (11.40, -88.28°)
Mathematics