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Alik [6]
2 years ago
12

Calculate the percentage increase if the price of a $30 train ticket is increased to $42​

Mathematics
1 answer:
quester [9]2 years ago
7 0

Answer:

40 % increase

Step-by-step explanation:

New price - original price

42-30 = 12

Divide by original price

12/30 = .4

Change to a percent

.4 * 100

40%

40 % increase

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Step-by-step explanation:

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2 years ago
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katen-ka-za [31]

Answer:

  750 < p < 1500

Step-by-step explanation:

The total cost of the affair for p attendees is ...

  750 +2.25p

The average cost is that number divided by p. The answer choices suggest that "between" means that the cost per person cannot be 2.75 or 3.25. Applying the limits to the average cost, we get ...

  2.75 < (750 +2.25p)/p < 3.25

  2.75 < 750/p + 2.25 < 3.25 . . . . . . . . separating the fraction parts

  0.50 < 750/p < 1.00 . . . . . . . . . . . . . . subtract 2.25

  2 > p/750 > 1 . . . . . . . . . . . . . . . . . . . . . take the reciprocal*

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* Taking the reciprocals of numbers with the same sign reverses their order:

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An alternate approach to the solution would be to multiply by p:

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To solve this requires it be made into two inequalities:

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and

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Then these would need to be recombined to form the answer:

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8 0
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8 0
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