Answer:
a. 20 means that per adult they will be charged $20 and 15 means per children under the age of 12 will be charged $15
b. x=4, therefore 20*4 + 15*0 = $80
*all you have to do is replace x with a 4
*0 because there are no children
c. x=2 and y=3
C= 20*2 + 15*3
C= $85
d. C= 20-5x +15/2y
C= 15x + 7.5y (because of the promotion)
Lets do the same thing as before ay?
x=4 and y=5
C= 15*4 + 7.5*5
C= $97.5
Explanation: