Solve the system by the substitution method. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. {(3, 1)}
B. {(3, 0)}
C. no solution; ?
D. {(2, 1)}
Answer: B
Mathematics
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Solve the problem.Show that the vectors 
b + 
a and 
b - 
a are orthogonal.
What will be an ideal response?
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Add or subtract. Write the answer in lowest terms.
+ 
A. 
B. 
C. 
D. 
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Factor completely. If a polynomial cannot be factored, say it is prime.x3 - 25x + 4x2 - 100
A. (x + 5)(x - 5)(x + 4) B. prime C. (x - 5)2(x + 4) D. (x2 - 25)(x + 4)
Mathematics
What part of the object or set of objects is shaded?
A. 
B. 
C. 
D. 
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