Admission to the museum is $12 for children and $15 for adults. on a certain day 2450 people go the the museum and $33,456 is collected
how many adults and children went to museum

C = children
a = adults

12c + 15a = 33456 (price)
c + a = 2450 (people)
c = 2450 - a (rewrite^)

12(2450 - a) + 15a = 33456 (substitute into the price equation)
29400 - 12a + 15a = 33456
3a = 4056
a = 1352

c = 2450 - (1352)
c = 1098

1098 children
1352 adults

it would cost him $0.45 to fill both cans.

Step-by-step explanation:

He fills the two bottles with water from a station that charges $0.03 for every 100 milliliters of water.

1000 milliliters = 1 liter

Therefore, 100 milliliters = 100/1000 = 0.1 liters

This means that the station charges $0.03 for every 0.1 liters

The two bottles that Juan has can hold 1.5 liters of water. Therefore, the amount it would cost Juan to fill his bottles is

(1.5 × 0.03)/0.1 = 0.45