What is the inverse of adding 13?

The additive inverse is just the opposite, -13

Answer: both parts of the lawn will have the same area of 64 square feet.the area of part 2 is easy to find. just multiply 8 by 8 and you have 64 square feet.for part 2, we know the length is 16 feet. now, we need to find the width. subtracting 8 from 12 on the left side gives us a width of 4. now, multiply 16 by 4 and you have 64 again.