Solve the formula for the specified letter.
+ 
= c for b
A. b = ac - 
B. b = 
- a
C. b = 
D. b = 
Answer: C
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Name the curve with the given polar equation. If it is a conic, give its eccentricity.r = 
A. Vertical ellipse; e = 
B. Horizontal ellipse; e = 
C. Horizontal hyperbola; e = 6
D. Vertical hyperbola; e = 6
Answer the question.The numbers ? and ? + ? determine the points A and B, respectively, on the unit circle. How are the points A and B related?
A. A and B are the same point. B. B is the reflection of A through the origin. C. B is the reflection of A about the x-axis. D. B is the reflection of A about the y-axis.
Solve the system by either elimination or substitution. Verify your work by using "intersect" on your graphing calculator of by checking that your result satisfies both equations of the system.2(3x - 7) + 5y = 24x - 3(4y + 1) = -23
A. (1, 7) B. (1, 2) C. (-1, 2) D. (2, 2)
Solve the problem.A toy manufacturer makes three types of toys. Toy A requires 12 minutes to assemble, 12 minutes to paint, 4 minutes to package, and sells for $20. Toy B requires 20 minutes to assemble, 12 minutes to paint, 8 minutes to package, and sells for $25. Toy C requires 24 minutes to assemble, 20 minutes to paint, 16 minutes to package, and sells for $30. The manufacturer has available 800 work-minutes for assembly, 600 work-minutes for painting, and 720 work-minutes for packaging each day. They must make at least 10 toys of type A and 15 of type B each day. How many of each type of toy should be produced each day to maximize revenues?
A. 21 of Toy A, 20 of Toy B, 5 of Toy C B. 20 of Toy A, 20 of Toy B, 6 of Toy C C. 25 of Toy A, 25 of Toy B, 0 of Toy C D. 6 of Toy A, 10 of Toy B, 20 of Toy C