Question

Which equation can be used to find the answer?

A garden with four sides has a perimeter of 45 ft. Three of the sides have lengths of 7 ft, 14 ft, and 13 ft. What is the length of the fourth side?

A.
s – 7 – 14 – 13 = 45
s = 79
79 ft

B.
s – 45 = 7 + 14 – 13
s = 53
53 ft

C.
s – 7 + 14 + 13 = 45
s = 25
25 ft

D.
s + 7 + 14 + 13 = 45
s = 11
11 ft

Answer 1

the perimeter is the sum of the lengths all around the figure.
here the figure has 4 sides and you have the total for the 4 sides and the measurement for 3 of the 4 sides.

Answer 2

D