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. {(-7, 2)}
B. {(-7, 3)}
C. no solution; ?
D. {(-8, 3)}
Answer: A
Mathematics
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A. 
B. 
C. 
D. 
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Factor out the GCF from the polynomial.36m9 - 24m7 + 84m4
A. 12m4(3m5 - 2m3 + 7) B. m4(36m5 - 24m3 + 84) C. -m4(-36m5 - 24m3 - 84) D. 12(3m9 - 2m7 + 7m4)
Mathematics
Perform the operation and write the result in the standard form.5i(4 - 2i)
A. 20i - 10 B. 20i + 10i2 C. 10 + 20i D. - 20i - 10i2
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Divide.
A. x2 + 5x + 4 B. -2x2 + 4 C. -2x2 + 5x + 4 D. x2 - 5x - 4
Mathematics