Solve the equation by completing the square.z2 + 18z + 61 = 0
A. -18 + 
B. 9 + 2
C. -9 ± 2
D. 9 ± 
Answer: C
Mathematics
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Perform the indicated operations. If possible, reduce the answer to its lowest terms.
÷ 
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.The temperature at 4 p.m. on January 22 was -10° Fahrenheit. By 9 p.m. the temperature had risen 24 degrees. Find the temperature at 9 p.m.
A. 14° B. -34° C. -14° D. 34°
Mathematics
Solve the problem.Evaluate 
by expanding across the third row. Show all your work.A = 
What will be an ideal response?
Mathematics
Let a and b be positive numbers. Determine whether the statement is true or false.(-a)(-a) is a negative number.
A. True B. False
Mathematics