Find the values of x for which the expression is a real number.

A.
B.  ? 
C.
D.  ? 


Answer: D

Mathematics

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Multiply. Write your answer in the form a + bi.(5 + 8i)(8 + 8i)

A. -24 - 104i B. 64i2 + 104i + 40 C. 104 + 24i D. -24 + 104i

Mathematics

Evaluate the expression.-3

A. - 27
B.
C. - 
D. 27

Mathematics

Determine whether the pair of fractions is equivalent.  and  

A. equivalent B. not equivalent

Mathematics

Express the sum using summation notation. +    +   + ... + 

A.
B.
C.
D.

Mathematics