Answer:
1) 6s + 8
2) 50
Step-by-step explanation:
1)
To find the perimeter, add the lengths of the sides.
perimeter = 3s - 1 + 2s + 5 + s + 4
perimeter = 6s + 8
2)
Replace s with 7 in the perimeter expression.
perimeter = 6(7) + 8
perimeter = 42 + 8
perimeter = 50
