Find a formula for the inverse of the function described below.A size 6 dress in Country C is size 44 in Country D. A function that converts dress sizes in Country C to those in Country D is 
A. f-1(x) = 
- 16
B. f-1(x) = 
C. f-1(x) = x - 16
D. f-1(x) = 
+ 16
Answer: A
Mathematics
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Solve by completing the square. Give exact solutions. Simplify radicals and reduce.x2 + 6x = 5
A. 3 + 
B. -1 ± 
C. -3 ± 
D. -3 ± 1
Mathematics
Find the mean. Round to the nearest tenth unless otherwise stated.Scores on an aptitude test: 615, 519, 354, 352, 592, 356, 355, 525, 470, 482
A. 452.9 B. 471.4 C. 462.0 D. 476.0
Mathematics
Express the complex number in trigonometric form.9
- 9i Express your answer in degrees.
A. 18(cos 300° + i sin 300°)
B. 
(cos 330° + i sin 330°)
C. 
(cos 300° + i sin 300°)
D. 18(cos 330° + i sin 330°)
Mathematics
Perform the specified calculation.For the vectors u = 
and w = 
, calculate |-2u| + |3w|.
A. 2
+ 3
B. -2
+ 3
C. 2
+ 3
D. 2
- 3
Mathematics