Alexis has a rectangular piece of red paper that is 4cm wide.It’s length is twice it’s width she glues a rectangular piece of blue paper on on top of the red piece measuring 3cm by 7cm how many square cm will be visible on top

Answer 1

several answers are possible, since your setup and question were so vague
4*8 - 3*7 = ___
4*8 = ___
4*8 + 3*7 = ___

It's not my job to figure out what you mean.
It's your job to say it so clearly you cannot be misunderstood.