Solve the problem.Which of the lines in the picture are lines of symmetry of the given figure?
A. m
B. l
C. l, m, and n
D. l and m
Answer: A
Mathematics
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Use the method of undetermined coefficients to solve the differential equation.
+ y = 9x + cos 2x; 
= 0 and y = 9? when x = ?
A. y = -9 sin x - 
cos x + 9x - 
cos 2x
B. y = 9 sin x + 
cos x + 9x - 
cos 2x
C. y = 9 sin x - 
cos x + 9x - 
sin 2x
D. y = 9 sin x - 
cos x + 9x - 
cos 2x
Mathematics
Solve the right triangle. Express angles in decimal degrees.
b = 2.47, c = 9.26
A. A = 75.1°, B = 14.9°, a = 9.6 B. A = 74.5°, B = 15.5°, a = 9.6 C. A = 14.9°, B = 75.1°, a = 8.9 D. A = 74.5°, B = 15.5°, a = 8.9
Mathematics
Simplify.
A. 487
B. 
C. 
D. 3
Mathematics
Provide an appropriate response.Given the set 
give the elements that are whole numbers.
A. 8 B. 0, 8 C. 0 D. -6, 0, 8
Mathematics