Answer:
Step-by-step explanation:
okay so i’m not 100% sure on how to do this but i think you can just add the two together? like 15 + 21 + b. like that’s be 36b. so i’m not sure if that’s how you do it but i think you can do it that way?
The Multiplicative Identity Property. This means that you can multiply 1 to any number... and it keeps its identity! The number stays the same!
Shape: Rectangle
Area: (Length) x (Width)
Perimeter: 2(Length) + 2(Width)
(SHOWED WORK IN PICTURE)