What is 12 12/8 rounded to the nearest thousands

The line y = x + passes through (−3, 7) and is parallel to y = 4x − 1.

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

Jorge wants to determine the enlarged dimensions of a digital photo to be used as wallpaper on his computer screen. the original photo was 800 pixels wide by 600 pixels high. the new photo will be 1,260 pixels wide. what will the new height be?