Simplify the expression using multiplication.6(3x - 8y + 2z)

A. -18x - 48y + 12z
B. 18x + 48y - 12z
C. 18x - 48y + 12z
D. 9x - 2y + 8z

Answer: C

Mathematics

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Find T, N, and B for the given space curve.r(t) = (cosh t)i + (sinh t)j + tk 

A. T = - (tanh t)i  + j  + (sech t)k; N = (-sech t)i  - (sinh t)k  ; 
B. T = (tanh t)i  + j  + (sech t)k; N = (sech t)i  - (tanh t)k; 
C. T = -  (tanh t sech t)i  + j  + (sech t)k; N = (-sech t)i  - (tanh t)k; 
D. T = (tanh t sech t)i  + j  + (sech t)k; N = (sech2 t)i  - (sinh t)k;  

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Mathematics

Solve by completing the square.z2 + 16z + 45 = 0

A. -16 + 3
B. 8 + 3, 8 - 3
C. 8 + 
D. -8 + , -8 - 

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Mathematics

Solve the equation. = 15

A. 225 B. 50,625 C. 160 D. 140

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Mathematics

Find the sum.

A. -70 B. 62 C. 2 D. 70

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Mathematics