Solve the problem.A plumber charges a fixed rate plus an hourly rate to do house calls. The ordered pair (3, 81) indicates total charges of $81 for a job taking 
and the ordered pair 
indicates total charges of $151 for a job taking 8 hours.a) Write a linear equation giving the total charges, y, in terms of the number of hours x.b) Use the equation found in part a to find how much it costs for 5 hours.c) How many hours would result in a total charge of $137?
A. y = 14x + 39; $109; 7 hours
B. y = 14x + 39; $70; 7 hours
C. y = 14x; $70; 7 hours
D. y = 14x + 39; $109; 9 hours
Answer: A
Mathematics
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Find the inverse of the function.f(x) = -7 - 3x
A. f-1(x) = -4 - x
B. f-1(x) = - 
- 
C. f-1(x) = - 
+ 
D. f-1(x) = 
- 
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Represent the shaded area in the figure group with an improper fraction.
A. 
B. 
C. 
D. 
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Solve the problem.A boat travels 7 miles south and then 9 miles east. How far is the boat from its starting point? Round approximations to the nearest tenth. 
East --9 mi-->
A. 5.7 mi B. 8 mi C. 65 mi D. 11.4 mi
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Solve the equation.8x - x = 9 - 30
A. -7 B. 7 C. 3 D. -3
Mathematics