1) in first place you must Know F(X) for every value of x
F(0) = 250(0.5)^0 = 250
f(1) = 250(0,5)^1 = 250*0,5 = 125
f(2)= 250(0,5)^2= 250*0,25 = 62,5
the average is = 250+125+62,5/ 3 = 145,83
Answer:
Option C is correct.
roots of the given equation , 
Step-by-step explanation:
Given the equation: 
We can write this equation as:

A quadratic equation is in the form of
......[1] where a,b ,c are the coefficient and x is the variable,
the solution of the equation is given by;

On comparing given equation with equation [1] we get;
a = 3 , b = -4 and c =10
So, the solution of the given equation is given by;

or

or
[∴
Simplify:

therefore, the roots of the given equation are; 
Answer:
30 - (20 ÷ x) ⋅ 4
Step-by-step explanation:
The answer is C. From the solution in the picture
Answer:
hi
Step-by-step explanation: