Solve the system of equations using matrices. Use Gaussian elimination with back-substitution. x + y + z - w=6 2x - y + 3z + 4w=-4 4x + 2y - z - w=-13 -x - 2y + 4z + 3w=12
A. {(- 
, 
, 
, - 
)}
B. {(4, -3, -5, 2)}
C. {(
, - 
, - 
, 
)}
D. {(-4, 3, 5, -2)}
Answer: D
Mathematics
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Find the average rate of change of the function over the given interval. g(t) = -3t2 - t, [5, 6]
A. -34
B. 
C. - 
D. -2
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Find an expression for the nth term of the arithmetic sequence.- 
, - 
, - 
, - 
, - 
, . . .
A. an = - 
B. an = - 
C. an = - 
D. an = - 
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Perform the indicated operation and simplify the result.
+ 
- 
A. x - 3
B. 
C. 
D. x + 7
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Solve the problem.If f varies jointly as q2 and h, and f = -24 when q = 2 and h = 2, find f when q = 4 and h = 3.
A. f = -48 B. f = -144 C. f = -9 D. f = -36
Mathematics