A4500 square foot roll of plastic wrap costs $23.95. if 120 square feet is need for a party game, what is the monetary value of that 120 square foot piece of plastic wrap?

For this case, the first thing to do is define a variable.

We have then:

We write now the proportion that models the problem.

We have then:

From here, we clear the value of x.

We have then:

Calculating we have:

the monetary value of that 120 square foot piece of plastic wrap is:

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,

-8/2y-8=5/y+4-7y+8/y^2-16

we move all terms to the left:

-8/2y-8-(5/y+4-7y+8/y^2-16)=0

we can not solve this equation