Find the product. Write the answer in standard form.(
+ 7i)(
- 7i)
A. 5 + 49i
B. 5 - 49i
C. -2
D. 54
Answer: D
Mathematics
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A. 
B. 
C. 
D. 
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Determine if the given ordered triple is a solution of the system.(-5, -1, 5)3x + 2y + z = 82x - 3y - z = 184x + y + 5z = -6
A. solution B. not a solution
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Graph the function.f(x) = 
A. 
B. 
C. 
D. 
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Find the difference and check.14.75 - 10.872
A. 3.878 B. 25.622 C. 3.978 D. 26.622
Mathematics