Solve the equation by completing the square.x2 + 10x + 4 = 0
A. -5 ± 
B. 5 + 
C. -10 + 2
D. 5 ± 2
Answer: A
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Find the derivative.s = t5 cos t - 14t sin t - 14 cos t
A. 
= - t5 sin t + 5t4 cos t - 14t cos t - 28 sin t
B. 
= t5 sin t - 5t4 cos t + 14t cos t
C. 
= - t5 sin t + 5t4 cos t - 14t cos t
D. 
= - 5t4 sin t - 14 cos t + 14 sin t
Solve the problem.Find the dimensions that produce the maximum floor area for a one-story house that is rectangular in shape and has a perimeter of 153 ft.
A. 38.25 ft × 38.25 ft B. 76.5 ft × 76.5 ft C. 12.75 ft × 38.25 ft D. 38.25 ft × 153 ft
Simplify the given expression. Expansion of any term is not necessary; proper recognition of the form of the expression leads to the proper result.cos 
x sin 
x
A. 
sin 3x
B. 
sin x
C. 2 sin 3x
D. sin 3x
Find the mean. Round to the nearest tenth when necessary.The numbers of miles John ran over the last six days were as follows: 4, 5, 10, 6, 11, 9
A. Mean = 8 miles B. Mean = 7.5 miles C. Mean = 6 miles D. Mean = 9 miles