Write the system of linear equations represented by the augmented matrix. Use x, y, and z as the variables.

A.   

B.   

C.

D.  


Answer: C

Mathematics

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Use the quadratic formula to solve the quadratic equation.5 - x2 = 8x

A. x = 4 + 
B. x = -4 ± 2
C. x = -4 ± 
D. x = -1 ± 

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Find the multiplicative inverse of the number.

A. 1
B. -8
C. 8
D. - 

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Evaluate the improper integral or state that it is divergent.

A. 0
B.
C.
D. Divergent

Mathematics

Solve the problem.Mary finds 9 fish at a pet store that she would like to buy, but she can afford only 5 of them. In how many ways can she make her selection? How many ways can she make her selection if he decides that one of the fish is a must?

A. 3024; 1680 B. 126; 70 C. 7560; 840 D. 15,120; 1680

Mathematics