It is half of the yard, because it extends from the corners. To find the area of the triangle of grass, you have to find the product of the legs divided by two.
30*10=300
300/2=150
150 square feet of Mr. West's backyard is covered in grass
Step-by-step explanation: First you have to divide $109 and $4 which will give you 27.25 then you have to divide 27 with 7 which will give you 3 remainder 7 So, each of them have $3