Perform the indicated operation and simplify the result.
- 
A. 
B. 2x + 5
C. 5
D. x + 5
Answer: B
Mathematics
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Write the complex number in trigonometric form r(cos ? + i sin ?), with ? in the interval [0°, 360°).9 + 9i
A. 9
(cos 135° + i sin 135°)
B. 9
(cos 45° + i sin 45°)
C. 9
(cos 225° + i sin 225°)
D. 9
(cos 315° + i sin 315°)
Mathematics
Find the probability.Suppose we select, without looking, one marble from a bag containing 8 red marbles, 9 blue marbles, and 5 green marbles. What is the probability of choosing a blue marble?
A. 
B. 
C. 
D. 
Mathematics
Solve the formula for the specified variable.F = 
C + 32 for C
A. C = 
(F - 32)
B. C = 
C. C = 
D. C = 
(F - 32)
Mathematics
Find an equation for the ellipse described.Center (0, 0); major axis vertical with length 8; length of minor axis is 6
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics