Solve the system using matrices. 6x - y + 9z = 219x + 7z = 342y+ z = 13
A. No solution
B. (-3, 6, 6)
C. (3, 1, 6)
D. (3, 6, 1)
Answer: D
Mathematics
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For the curve r(t), write the acceleration in the form aTT + aNN.r(t) = (4t sin t + 4 cos t)i + (4t cos t - 4 sin t)j + 9k
A. a = 
N
B. a = 4tN
C. a = 4T + 
N
D. a = 4T + 4tN
Mathematics
Calculate the derivative of the function. Then find the value of the derivative as specified.
? =2 if r = 
A. 
= 
; 
? =2
= 
B. 
= - 
; 
? =2
= - 
C. 
= - 
; 
? =2
= - 
D. 
= 
; 
? =2
= 
Mathematics
Write the expression in standard form.
? 
A. -100i B. 10 C. -10 D. -10i
Mathematics
Find the indicated term of the geometric sequence.a2 = -9, r = -3; Find a5.
A. -81 B. -243 C. 27 D. 243
Mathematics