Use the Gauss-Jordan method to solve the system of equations. If the system has infinitely many solutions, let the last variable be the arbitrary variable.x - 8y + z = 53x - y + 2z = 5
A. 
B. ?
C. 
D. 
Answer: C
Mathematics
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Solve the problem.Of the 69 people who answered "yes" to a question, 10 were male. Of the 64 people who answered "no" to the question, 13 were male. If one person is selected at random from the group, what is the probability that the person answered "yes" or was male? Round to the nearest thousandth when necessary.
A. 0.145 B. 0.173 C. 0.617 D. 0.692
Mathematics
Find the whole.48% of what number of hectares is 84 hectares?
A. 57 B. 175 C. 1750 D. 0.57
Mathematics
Write the improper fraction and mixed number represented by the shading.
A. 
; 1
B. 
; 1
C. 
; 1
D. 
; 1
Mathematics
Use factoring techniques to solve the equation.(4x + 13)(x - 7) = (3x + 11)(x - 8)
A. {7, 8}
B. {3, -1}
C. {-2, - 7, 
}
D. {- 
, 7, - 
, 8}
Mathematics