What number should be added to complete the square of the expression?x2 + 
x
A. 
B. 
C. 
D. 
Answer: C
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Find the work done by F over the curve in the direction of increasing t.F = - 
i + 
j + 
k; C: r(t) = 
i + 
j + 5tk, 0 ? t ? 
A. W = 
+ 
?2
B. W = 
+ 
?2
C. W = 
+ 
?2
D. W = 
+ 
?2
Solve the problem.Draw a scatterplot of the given data. Find the equation of the line containing the points 
and 
. Graph the line on the scatterplot.
A. y = 0.41x + 0.47
B. y = 0.42x + 0.5
C. y = 0.35x + 0.6
D. y = 0.46x + 0.47
Simplify.-13 + (-16) + (-8) + (-6) + 11 + (-1)
A. -33 B. 3 C. -55 D. 9
Solve. Round your answer to the nearest tenth, if necessary.An object is thrown upward from the top of a 
building with an initial velocity of 48 feet per second. The height, h, of the object after t seconds is given by the quadratic equation 
When will the object hit the ground?
A. In 5 seconds B. In 160 seconds C. In 2 seconds D. In 7 seconds