a teacher asks her students to find an expression for the number of tiles needed to surround such a square pool , and sees the following responses from her students
{"Image DocumentName": "A teacher asks her students to find an expression for the number of tiles needed to surround such a square pool, and sees the following responses from her students:", "Image ImageDescription": "4(s+1) s2. 4s+4. 2s+2(s+2) 4s. Is each mathematical model correct or incorrect? How do you know?", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}