Write the number as a product of a real number and i. Simplify the radical expression.
A. 5i
B. -5i
C. ± 5
D. -i
Answer: A
Mathematics
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Evaluate the expression.(9 - 82)(-8 + 
)
A. 73 B. -47 C. -55 D. -4895
Mathematics
Compute.-?24?
A. - 
B. 24
C. 0
D. -24
Mathematics
Use the formula for the sum of the first n terms of a geometric sequence to evaluate the sum.
A. 
B. 
C. 
D. 
Mathematics
Solve.If y varies directly as the cube of x, and y = 5 when x = 25, find y when x = 15.
A. 3
B. 
C. 
D. 
Mathematics