Your answer would be -18m-6n-30
Answer: 40 ft by 4 ft
Step-by-step explanation:
See attached picture
I think you would do 39 x 4 because if the SQUARE brick has sides 1 foot long, you count up the sides and get 4 feet. She has 29 square feet of patio bricks so you would multiply 39 x 4. I don't know if this is correct. Hopefully I helped!