Solve the logarithmic equation.log (x + 10) - log (x + 4) = log x
A. 2, -5
B. 2
C. 6
D. ?
Answer: B
Mathematics
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Find the mass of the wire that lies along the curve r and has density ?.r(t) = 5i + (9 - 3t)j + 4tk, 0 ? t ? 2? ; ? = 9(1 + sin 9t)
A. 90? units B. 10 + 90? units C. 18? units D. 20 + 90? units
Mathematics
Determine whether or not B = A-1.A = 
B = 
A. Yes B. No
Mathematics
Factor.15z2 + 11z - 12
A. (3z + 4)(5z - 3) B. (15z + 1)(z - 12) C. (15z + 4)(z - 3) D. (3z - 4)(5z + 3)
Mathematics
Solve the equation by completing the square.(x + 8)(x - 9) = 1
A. 
B. 
C. 
D. 
Mathematics