1. area is length * width so: a = L * w 60 = L * 10
divide both sides by 10: 6 = L
2. perimeter is the total length of all sides added together perimeter = side1 + side2 + side3 + side4 p = s1 + s2 + s3 + s4
a rectangle has only 2 different side lengths meaning s1 = s3 and s2 = s4. So so you can subsfuture s1 for s3 and s2 for s4: p = s1 + s2 + s1 + s2 p = s1 + s1 + s2 + s2
s1 + s1 can be written as 2 * s1 and same for s2: p = 2 * s1 + 2 * s2
We we know 1 side has length 8 and perimeter is 32. we can sub in values: 32 = 2 * s1 + 2 * 8 32 = 2 * s1 + 16 16 = 2 * s1 s1 = 8
3.well to cover the floor we needs it's its surface area. area = length * width
we know length and width are 8 so area = 8 * 8 area = 64
4. well to fence it I we only need perimeter. Just like in problem 2 we can say: p = 2 * length + 2 * width
length and width are 8 and 10 so; p = 2 * 10 + 2 * 8 p = 20 + 16 p = 36
5. a border is the same as a perimeter so this is like problems 2 and 4 so: p = 2 * 9 + 2 * 9 p = 36
Now we want the cost and it is $1 per foot. so we can muLtiply the feet we need by cost per foot: 36ft * $1 = $36
6. the garden is 10 by 2 and we need area to cover the whole thing: area = 10 * 2 area = 20 square feet
If if one bag covers 10 square feet then it will take 2 bags to cover the 20 square feet of her garden
