Write the expression in the standard form a + bi.-8i(-9 + 4i)
A. -32 + 72i
B. 72i - 32i2
C. 32 + 72i
D. 72i + 32i2
Answer: C
Mathematics
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Use < or > for ? to write a true sentence.
? 
A. < B. >
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Provide an appropriate response.Describe two advantages of the substitution method over the graphing method for solving systems of equations.
What will be an ideal response?
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Simplify.
A. 
B. x7
C. x-3
D. x13
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