How much is the cost for a car with 6 passengers ?

Question

the charge for a drive in is a set fee for the car plus an additional amount for each passenger. the first car with 2 passengers was charged $15 and the second car with 5 passengers cost $21.

Answer 1

First work out cost per passenger by figuring the difference from the known facts

$21-$15= $6

The second car has 3 more passengers than the first one.

So

$6/3 passengers =$2 (cost per passenger)

Therefore the cost of a car = $11 (21-10) & (15-4)

6 passengers will cost $12 (6x2)

Plus the car $11

=$23