Find Dxy.y = ln(sech (4x + 10))
A. tanh (4x + 10)
B. 
C. -4 tanh (4x + 10)
D. -tanh (4x + 10)
Answer: C
Mathematics
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Find the standard equation of the indicated hyperbola.Center (-4, 3), focus (-4, 9), vertex (-4, 6)
A. 
- 
= 1
B. 
- 
= 1
C. 
+ 
= 1
D. 
- 
= 1
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Use the quadratic formula to solve the equation.(x + 8)(x - 1) = 7
A. 
B. 
C. 
D. 
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Determine the size of matrix A and tell whether it is a square matrix, row matrix, column matrix, or none of these.A = 
A. 6 × 6; square matrix B. 9; none of these C. 3 × 3; square matrix D. 2 × 3; none of these
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Write your answer in lowest terms.Rosetta's bonus for the year was $2600. She spent $350 on new furniture. What fraction of her bonus was spent on furniture?
A. 
B. 
C. 
D. 
Mathematics