Solve the problem.The cost for labor associated with fixing a washing machine is computed as follows: There is a fixed charge of $25 for the repairman to come to the house, to which a charge of $20 per hour is added. Find an equation that can be used to determine the labor cost, C, of a repair that takes x hours. Write the final answer in the form C = mx + b.
A. C = -20x + 25
B. C = 45x
C. C = 25x + 20
D. C = 20x + 25
Answer: D
Mathematics
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Find the standard-form equation of the hyperbola centered at the origin which satisfies the given conditions.Vertices at (0, 4) and (0, -4); foci at (0, 9) and (0, -9)
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Mathematics
Sketch the graph of the polar equation. Identify the curve.r = 4 - 5 cos ?
A. inner loop limaçon
B. inner loop limaçon
C. inner loop limaçon
D. inner loop limaçon
Mathematics
Tell whether the statement is true or false.{6, 8, 9, 11} ? {0, 10, 8, 13, 6} = {6, 8}
A. True B. False
Mathematics
Evaluate.log8 
A. -3 B. 64 C. 3 D. -64
Mathematics