Jason is selling video games. to earn his monthly bonus, he must sell a minimum of 5 games. he has 30 he can sell. the video games cost $20 each. the function f(x) = 20x can be used to represent this situation. what is the practical range of the function? all whole numbers from 5 to 30, inclusive. all whole numbers from 100 to 600, inclusive. all real numbers. all multiples of 20 between 100 and 600, inclusive.

Correct choice is B

Step-by-step explanation:

The function represents the situation, where x is the number of sold video games and f(x) is the total cost of sold games.

Jason  must sell a minimum of 5 games, this means that He has 30 video games he can sell, then Thus, the domain of the function is

The range of the function f(x) is

77

step-by-step explanation:

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.