The expression 25C +40 a represents the total cost of a group of children and adults to attend the amusement park the variable see represents the number of children attending the variable, a represents the number of adults attending. What is the total cost of 12 children and for adults.

To find the total cost for 12 children and 4 adults, we can substitute C=12 and A=4 into the expression 25C + 40A:

Total cost = 25(12) + 40(4)
Total cost = 300 + 160
Total cost = 460

Therefore, the total cost for 12 children and 4 adults to attend the amusement park is $460.