The Function having highest Degree of Four given here is :

As the given function has highest degree of four, it has maximum of four roots.
As complex and Irrational root occur in pairs, so There are many possibilities
1. Two Complex or Irrational + Two Real
2. Four real roots
3.All roots are complex or irrational
By looking at the options described below, it means it has four real roots.
It will cut X axis at four points.
With the help of Desmos you can directly find the solution of this problem, but without desmos Graphing, we first have to check by Taking different points on the curve whether graph of function described here is correct or not, i.e by method of increasing and decreasing formula of a function.The method to check is
If there are two points on the curve i.e 
1.
Increasing Function.
2.
Decreasing Function.
Option (4) is true .
If she gains a card that would be a positive 1, if she sells one that would be negative 1, and if she keeps one than that would be 0.
Answer:
C
Step-by-step explanation:
I believe the answers to be 75+5x=y
The next 18 days because your trying to see how many days it is until he does BOTH