Y=x².
This is te function of a parabola open upward
the domain is all values of x ={x/x∈z}
20% off means you pay 80% of the price so you multiply by 0.8, and 7% tax means you multiply by 1.07
Resulting cost = 18.99*0.8*1.07 = 16.26
Hope this helps let me know if im wrong!
The answer is 289,564,320. Have a nice day and Happy Holidays
The answer to your problem is: 122.32
