Solve.
+ 
= - 
A. x = - 
B. x = - 
C. x = 
D. x = 
Answer: B
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Solve by completing the square.24d2 + 50d + 25 = 0
A. - 
, - 
B. - 
, - 
C. 
, 
D. 
, 
Solve the problem.The magnitude and direction of two forces acting on an object are 35 pounds, 
, and 55 pounds, S30°E, respectively. Find the magnitude, to the nearest hundredth of a pound, and the direction angle, to the nearest tenth of a degree, of the resultant force.
A. 
= 57.04; ? = -23.6°
B. 
= 43.30; ? = 2.7°
C. 
= 49.17; ? = -11.3°
D. 
= 65.19; ? = -7.5°
Solve the problem.A 5.8-ft fence is 15.431 ft away from a plant in the direction of the sun. It is observed that the shadow of the fence extends exactly to the bottom of the plant. (See drawing) Find ?, the angle of elevation of the sun at that time. Round the measure of the angle to the nearest tenth of a degree when necessary.
A. ? = 20.6° B. ? = 22° C. ? = 20.4° D. ? = 20.8°
Add the real numbers. Write any improper fraction as a whole or mixed number where appropriate.- 
+ 
A. - 
B. 
C. 1
D. - 1