Find the acute angle between the lines.9x + 7y = -6 and 8x + 2y = -8
A. 1.987 radians
B. 0.4160 radians
C. 1.155 radians
D. 0.9147 radians
Answer: B
Mathematics
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Find the indicated matrix.Let B = [-1 6 5 -3]. Find -4B.
A. [-3 4 3 -5] B. [-4 24 20 -12] C. [4 6 5 -3] D. [4 -24 -20 12]
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E ( X )
The probability density function of X is f (x) = 81 / x4 over [3, ?) . Compute the following quantity.
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Simplify the complex rational expression using Method I or Method II.
A. 8
B. x2 + 8
C. 
D. 
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?Find an equation of the tangent line to the graph of 
at the point 
.
?
A. ?
B. ?
C. ?
D. ?
E. ?
Mathematics