Write the imaginary numbers using the letter i.
A. -5
B. 5
C. -5i
D. 5i
Answer: D
Mathematics
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Use the properties of summation notation to find the sum. 
A. - 15 B. 21 C. 3 D. 18
Mathematics
Graph the equation using a graphing calculator.r = sin 4? + 3
A. 
B. 
C. 
D. 
Mathematics
Provide an appropriate response.The three-part inequality a < x ? b means "a is less than x and x is less than or equal to b". Which of these inequalities is not satisfied by any real number x?
A. 0 < x ? 4 B. -2 < x ? 6 C. -5 < x ? -11 D. -8 < x ? -7
Mathematics
For the given matrix A, find a basis for the corresponding eigenspace for the given eigenvalue.A = 
, ? = 7
A. 
B. 
C. 
D. 
Mathematics