Solve the equation.
A. a = 11
B. a = -6
C. a = 3
D. a = 6
E. a = 9
Answer: D
Mathematics
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Find the derivative of y with respect to the appropriate variable.y = 9 tanh-1 (cos x)
A. 
B. ln 
sin x
C. 
D. 
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Write an expression for the general or nth term, an, of the arithmetic sequence.3, -7, -17, -27, . . .
A. an = -10(n+1) + 3 B. an = -10n + 3 C. an = -10n + 13 D. an = -10n- 13
Mathematics
Graph the equation.25x2 - 4y2 = 100
A. 
B. 
C. 
D. 
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Solve the problem.Find the dimensions of a rectangular enclosure with perimeter 40 yd and area 91 yd2.
A. 13 yd by 7 yd B. 16 yd by 7 yd C. 14 yd by 6 yd D. 15 yd by 6 yd
Mathematics