Solve by the quadratic formula. Simplify answers. Use i notation for nonreal complex numbers.x2 + 8x + 25 = 0
A. x = -4 ± 9i
B. x = -4 + 3i
C. x = -7, -1
D. x = -4 ± 3i
Answer: D
Mathematics
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Find the moment or center of mass of the wire, as indicated.Find the center of mass of a wire that lies along the first-quadrant portion of the circle 
if the density of the wire is 
A. 
= 
, 
= 
B. 
= 1, 
= 1
C. 
= 
, 
= 
D. 
= 
, 
= 
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The line graph shows the recorded hourly temperatures in degrees Fahrenheit at an airport.
Estimate when the temperature was -5°F.
A. 10:30 a.m. B. 10:15 a.m. C. 10:45 a.m. D. 10 a.m.
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Solve the problem.A number increased from 2254 to 9746 . Find the amount of increase.
A. 7492 B. 7484 C. 9492 D. 7404
Mathematics
Solve the equation.
+ 
= 4.6
(Round to the nearest thousandth.)
A. 0.965, 1.247 B. 1.949, 3.113 C. 0.203, 1.043 D. 1.721, 3.491
Mathematics