Answer:80x+ 40y = 480
Explanation:
Hi, to answer this question we have to write an equation in the form ax +by =C (standard form) with the information given: 
The variables are: 
x = number of days (tickets) 
y = number of days (snowboard) 
We have to multiply the price of each lift ticket per day ($80) by the number of days x, and add the product of the price of the snowboard rentals per day ($40) and the number of days y. 
That expression must be equal t the total cost: $480 
So, the equation is: 
80x+ 40y = 480