Answer:
![(23)/(21) feets](https://img.qammunity.org/2020/formulas/mathematics/middle-school/iglytxwayw17e2s9cs83gfsio7hzdtco2c.png)
Explanation:
Given.
Sally started with two feets of cloth.
Total cloth =
![2 feets](https://img.qammunity.org/2020/formulas/mathematics/middle-school/80fdkjot20ry5uh8o6mffuav8nclgea6zb.png)
She used
of a foot of the cloth to make a pillow cover.
And another
of a foot of the cloth to make a table cloth.
She used total cloth to make a pillow cover and table cloth =
![(1)/(3) +(4)/(7)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/iyq4bq0pkb5vfjsaqeulj6lnk2j4lxvucv.png)
![=(7+12)/(21) \\=(19)/(21)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/vvcqjwgsdumeefnvj10f0tjixtk54b4xij.png)
Total used cloth by Sally =
![(19)/(21)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/okegiigxsa0wy65t1sz02eblb8jmlbw0sw.png)
The equation for remaining cloth
remaining cloth = total cloth - used cloth
remaining cloth
![= 2 - (19)/(21)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/rcdpqna387j9gpanknz1lux2lgy3g7o2fl.png)
remaining cloth
![= (2* 21-19)/(21)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/bl2cw9mnovb3tjqvnvs9h4hz2qlxsbit78.png)
remaining cloth
![= (42-19)/(21)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/ibleov8k17v4yippbdutp41rt7dytxtt40.png)
remaining cloth
![= (23)/(21)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/9p9xw1flmyy8n2z5ersdyslcvwlrxkvl9s.png)
Sally has remaining cloth =
feets