Answer:
side lengths are 8, 28, and 22 feet
Step-by-step explanation:
The perimeter is the sum of the lengths of the three sides:
58 = n + (3n+4) + (4n-10)
64 = 8n . . . . . collect terms, add 6
8 = n . . . . . . . .divide by 8. First side length
3n+4 = 3·8 +4 = 28 . . . . second side length
4n-10 = 4·8 -10 = 22 . . . . third side length
The side lengths are 8 ft, 28 ft, 22 ft.
