Solve the system by using Gaussian elimination with backward substitution or by reducing the matrix to reduced-row echelon form.3x + 4y + z = -35x - 2y - z = -194x + y + 2z = -7
A. No solution
B. (-3, 1, 2)
C. (-3, 2, 1)
D. (2, 1, -3)
Answer: B
Mathematics
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Solve the problem.Find the center of mass of the rectangular solid of density 
defined by 
, 
, 
.
A. 
= 
, 
= 1, 
= 5
B. 
= 
, 
= 
, 
= 
C. 
= 3, 
= 
, 
= 
D. 
= 6, 
= 
, 
= 
Mathematics
Evaluate the function at the given value of x.f(x) = 9 - 3x2, f(-5)
A. 24 B. -66 C. 84 D. 39
Mathematics
Multiply the polynomials using the FOIL method. Express the answer as a single polynomial in standard form.(4x - 1)(x + 4)
A. x2 - 4x + 15 B. x2 + 15x + 14 C. 4x2 + 14x - 4 D. 4x2 + 15x - 4
Mathematics
Without graphing, find the line of symmetry.f(x) = 
(x - 3)2 + 3
A. x = 4 B. x = 2 C. x = 3 D. x = -3
Mathematics