Solve the equation. Give a general formula for all the solutions.cos ? = 1
A. 
B. {?|? = ? + 2k?}
C. 
D. {?|? = 0 + 2k?}
Answer: D
Mathematics
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Graph the inequality.2x + 5y > -10
A. 
B. 
C. 
D. 
Mathematics
Find the nonreal complex solutions of the equation. Write your answer in standard form.(x + 4)2 = -20
A. {-4 ± 2i
}
B. {±2i
}
C. {-4 ± 2i
}
D. {-4 ± 2
}
Mathematics
Determine whether the matrix is in row-echelon form. If it is, then determine also whether it is in reduced row-echelon form.
A. Yes; yes B. Yes; no C. No
Mathematics
Divide.(63x7 + 27x5 - 54x2) ÷ 9x2
A. 7x5 + 3x3 - 6 B. -63x5 + 27x3 + 54 C. 63x5 + 27x3 - 54 D. 7x7 + 3x5 - 6x2
Mathematics