Solve the problem.Brandon can paint a fence in 12 hours and Elaine can paint the same fence in 11 hours. How long will they take to paint the fence if they work together? Give your answer rounded to one decimal place, if necessary.
A. 5.8 hr
B. 5.5 hr
C. 5.7 hr
D. 11.5 hr
Answer: C
Mathematics
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Provide an appropriate response.Write 
as a whole or mixed number.
A. 
B. 
C. 
D. 
Mathematics
Find the coordinates of the vertex of the parabola.x = 5y2 - 40y + 82
A. (4, 0) B. (0, 2) C. (4, 2) D. (2, 4)
Mathematics
Simplify the expression. Assume that all variables are positive when they appear.
- 
+ 
A. 12x
- 5
B. 12x
- 5
C. 11x
- 5
D. 12
- 
Mathematics
Use a proportion to solve the problem.The ratio of the distances a 7-iron and a 5-iron will drive a golf ball is 5 to 6. If a golfer averages 127 yards with a 7-iron, how far should he average with a 5-iron?
A. 152.4 yd B. 106 yd C. 116 yd D. 138 yd
Mathematics