Solve for x.
= 39
A. 24
B. 3
C. -2
D. 5
Answer: B
Mathematics
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Solve by the substitution method.x + 7y = -222x + 6y = -12
A. {(-6, -3)} B. {(6, -4)} C. {(5, -3)} D. ?
Mathematics
Solve the problem. Express your answer as an integer or simplified fraction.7x - (5x - 1) = 2
A. 
B. 
C. - 
D. - 
Mathematics
Write the expression in the standard form a + bi.(1 + i)20
A. -1024i B. 1024 C. 1024i D. -1024
Mathematics
Write the number as a product of a real number and i. Simplify the radical expression.
A. -i
B. 13i
C. ± 13
D. -13i
Mathematics