Can someone me with this problem! my smoll brain cant figure it out

If there are 12 moths and some have 31 days and others have 30 days how many have 28 days?

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm

(60 points) explain this in detail