Answer:
9 inches wide
Step-by-step explanation:
so in the text it tells you that the rectangle is 3 inches wide by 4 inches long
then it gives you the final length but you need the width. so what i did is find out how much the increase of the length was, the length was4 at the start then ended at 12 to find out how much it increased i divided 12 by 4 and got 3. that shows that the object is 3 times larger so then I multiplied the original width by 3 which would be 3*3 which equals 9. so 9 is the width of the enlarged shape.
