Solve the system using the inverse of the coefficient matrix of the equivalent matrix equation. 2x - y - 5z = -20 3x + 7y - 8z = -7-9x - 3y + z = -40
A. {(4, 5, 3)}
B. ?
C. {(-4, 3, 8)}
D. {(4, 3, 5)}
Answer: D
Mathematics
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10 
km
A. 23 
km
B. 23 
km
C. 23 
km
D. 16 
km
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Determine the center of the ellipse.
+ 
= 1
A. (4, -2) B. (-4, -2) C. (4, 2) D. (-4, 2)
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Perform the indicated operations and simplify the result. Leave the answer in factored form.
+ 
A. 
B. 
C. 6x + 10
D. 
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Graph the system of inequalities.
A. 
B. 
C. 
D. 
Mathematics