X-0.20x=5.56
Solve for x
So the original price is
X=6.95
X=child's ticket price

So adult's ticket price would be:

Answer:
On a recent day, 8 euros were worth $11 and 40 euros were worth $55. Enter an equation of the form y = kx to show the relationship between the number of euros and the value in dollars. First solve k which is the slope so k = ( 55- 11) / ( 40 -8) = 1.375
Y= 1.375x
Step-by-step explanation: