Solve the equation.x + 
= 
A. x = 
B. x = 1
C. x = 
D. x = 
Answer: A
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Solve the equation 
for ?y. Round your answers to two decimal places, if necessary.
?
A. 
or 
B. 
or 
C. 
or 
D. None of the above.
Find the expected value.A new light bulb has been found to have a 0.02 probability of being defective. A shop owner receives 500 bulbs of this kind. How many of these bulbs are expected to be defective?
A. 20 B. 100 C. 10 D. 500
A cone sliced by a plane results in a type of curve called a conic section. Use the given information and figure to identify the conic section produced in the plane. The plane is parallel to the axis of the cone. 
A. circle B. hyperbola C. ellipse D. parabola
The following expressions represent denominators of rational expressions. Find their LCD.r2 + 10r + 25 and r2 + 5r
A. r(r + 5) B. r(r + 1)(r + 5) C. (r + 5)2 D. r(r + 5)2