The area equation here is:

That means that the area depends on the width measurement of the rectangle.
To graph a quadratic function you have to see if the parabole is positive and the transformations, in this case, are positive and have a multiplication by two, which means that the graphics in x=1 and x=-1 will be y=2
Finally, you can conclude that there, you have a relationship between the area and the width of the rectangle because is a quadratic relationship and the area will increase in a quadratic form according to the increase of the width.
First find out what 40% of 200 is
200 times .4 is 80
then find out what 1/3 of 150 is
divide 150 by three, which is 50
if it was 2/3 instead of 1/3, you would multiply 50 by 2
40% of 200 is greater
Answer:
9.) 
10.) 
11.)
minutes of calling would make the two plans equal.
12.) Company B.
Step-by-step explanation:
Let <em>t</em> equal the total cost, and <em>m,</em> minutes.
Set up your models for questions 9 & 10 like this:
<em>total cost = (cost per minute)# of minutes + monthly fee</em>
Substitute your values for #9:

Substitute your values for #10:

__
To find how many minutes of calling would result in an equal total cost, we have to set the two models we just got equal to each other.

Let's subtract
from both sides of the equation:

Subtract
from both sides of the equation:

Divide by the coefficient of
, in this case: 

__
Let's substitute
minutes into both of our original models from questions 9 & 10 to see which one the person should choose (the cheaper one).
Company A:

Multiply.

Add.

Company B:

Multiply.

Add.

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