Length = 20 ft
If he uses 60 ft of fencing to line his rectangular backyard, then the perimeter is 60 ft.
Perimeter formula is ((Width × 2) + (Length × 2))
10 × 2 = 20
20 × 2 = 40
40 + 20 = 60
Step-by-step explanation:
x²-3=0
x²=3
x=√3
<h2>stay safe healthy and happy.</h2>
I think maybe either B or C, ope I helped, sorry if I didn't!!
I think it would be 7.5!!