7) Molly is replacing the rectangular window panes in her house. She will need to order the correct size of glass for each window. Each window will need to be 2 x squared plus 5 x minus 12 inches2. She knows that the width will be x+4 inches. What should the length of the glass pane be?

Step-by-step explanation:

The area of the rectangular window is equal to the product between the length of the window and its width:

(1)

where

A is the area

L is the length

W is the width

In this problem, the area of the glass window is

This can be rewritten as

(2)

The two expressions, in fact, are equivalent.

Also, we know that the width  is

(3)

By comparing (1) with (2) and (3), we notice immediately that

Therefore, this is the length of the glass pane.

choice b is correct

step-by-step explanation:

we have been given the following system of inequalities;

we are required to graph the solution to the system of inequalities. using a graphing tool, the graph of the system is as shown in the attachment. the continuous line represents the graph of while the dotted line represents .

step-by-step explanation:

try remembering the steps