Factor completely the polynomial. Indicate any that are not factorable using integers.x 2 - 10x + 21
A. (x + 3)(x + 7)
B. (x + 3)(x - 7)
C. (x - 3)(x - 7)
D. (x - 3)(x + 7)
E. not factorable
Answer: C
Mathematics
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A. - 
B. - 
C. - 
D. - 
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Solve the system using the addition method. If the system is inconsistent and has no solution, state this. If the system is dependent, write the form of the solution for any real number x. x + 8y = 51-4x + 7y = 69
A. ? B. (-5, 7) C. (-6, 8) D. (5, 8)
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Multiply. Simplify the answer completely.
? 
A. 
B. 
C. 
D. 
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