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14-01-2017
Mathematics

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A cab company calculates cab fares using the expression 1.50d + 3, where d is the distance traveled in miles. If a passenger has to pay a $21 fare for a ride, which number from the set {9, 12, 15, 18} is the value of d?

9

Respuesta :

calculusxy calculusxy

14-01-2017

Set 1.50d + 3 equal to $21

1.50d + 3 = 21
Now solve for d
1.50d + 3 - 3 = 21 - 3
1.50d = 18
d = 12

Answer Link

AntonDaLedge AntonDaLedge

14-01-2017

1.50d + 3 = 21
1.50d = 18
d = 18/1.50
d = 12

Answer Link

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