Plz plz explain how you got the answer plz plz plz plz plz plz

3. Design A and Design B both have an area of 20. This is because the dimensions of Design A are 10 x 2 and the dimensions of Design B are 5 x 4. To find the area, you multiply the length by width, so the area of Design A is 20 and the area of Design B is 20.
 
4. To find the perimeter, you must count up all the square units. The perimeter of Design A is 20, and the perimeter of Design B is 14, so Design A has the greater perimeter.

5. Draw one rectangle 3 x 4 then draw another rectangle 2 x 6.

12+3b -1=-5-b -12-1+5=-b-3b -8=-4b