Write the expression in the standard form a + bi.i6
A. i
B. -1
C. 1
D. -i
Answer: B
Mathematics
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Solve the quadratic equation by completing the square.x2 + 10x + 15 = 0
A. {5 - 
, 5 + 
}
B. {-10 + 
}
C. {-5 - 
, -5 + 
}
D. {5 + 
}
Mathematics
Solve the problem.A tree casts a shadow 28 m long. At the same time, the shadow cast by a 53-cm tall statue is 79 cm long. Find the height of the tree. Round results to the nearest unit.
A. 42 m B. 19 m C. 18 m D. 41 m
Mathematics
Use Cramer's rule to determine if the system is inconsistent system or contains dependent equations.
A. system is inconsistent B. system contains dependent equations
Mathematics
Write the following as a single radical. Assume that all variables represent nonnegative values.
A. 
B. 
C. 
D. 
Mathematics