Use Cramer's rule to solve the system. x + 2y - 3z + w = 7 3x + 4y - z + 2w = 4-2x + y + z - w = -3 x - y + 2z - 2w = 1
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Solve the problem.If (a, 3) is a point on the graph of y = 2x - 5, what is a?
A. 1 B. -1 C. -4 D. 4
Mathematics
Solve the problem.Which of the lines in the picture are lines of symmetry of the given figure?
A. Only m B. m and o C. l and n D. l, m, n and o
Mathematics
Let W be the subspace spanned by the u's. Write y as the sum of a vector in W and a vector orthogonal to W.y = 
, u1 = 
, u2 = 
A.
y = 
+ 
B.
y = 
+ 
C.
y = 
+ 
D.
y = 
+ 
Mathematics
Use the graph of y = 
to solve the equation 
where 
and y2 represent linear functions.
A. {0} B. {6} C. {5} D. {5.5}
Mathematics