The expression and the length of ribbon that she needs for both pillows is [tex]\rm 4(2x^2+4x-6); 130\;inches[/tex] . Therefore the correct option is D).
Given :
Side length of the pillow = [tex]2x^2 +1[/tex]
Ribbon side length = 4x - 7
Solution :
The length of ribbon that she needs for both pillows,
[tex]= 4(2x^2+1)+4(4x-7)[/tex]
[tex]=4(2x^2+1+4x-7)[/tex]
[tex]=4(2x^2+4x-6)[/tex]
The length at x = 3.5 is,
[tex]=4(2(3.5)^2+4(3.5)-6)[/tex]
[tex]\rm =130\;inches[/tex]
Therefore, the correct option is D).
For more information, refer the link given below
https://brainly.com/question/25018625
