Find the domain of the function.y = 
A. [-?, 20]
B. (-?, ?)
C. all real numbers except 20
D. (
, ?)
Answer: A
Mathematics
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Find the acute angle, in radians, between the lines.-4x - 7y = -1 and 6x - 9y = 2
A. 2.678 radians B. 0.4636 radians C. 1.107 radians D. 0.4472 radians
Mathematics
Find the standard deviation for the given data. Round your answer to one more decimal place than the original data.3, 3, 15, 12, 17, 9, 5, 14, 9
A. 5.2 B. 5.6 C. 4.9 D. 1.2
Mathematics
Graph the function.f(x) = ln x - 2 
A. 
B. 
C. 
D. 
Mathematics
Solve by addition or substitution.-4x + 2y = 34x - 2y = 3
A. 
B. 
C. {(r, s)|-4r + 2s = 3}
D. ?
Mathematics