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Which equation can be used to find the answer?

A playground with four sides has a perimeter of 73 ft. Three of the sides have lengths of 14 ft, 19 ft, and 25 ft. What is the length of the fourth side?

A.
s + 14 + 19 + 25 = 73
s = 15
15 ft

B.
s – 14 + 19 + 25 = 73
s =43
43 ft

C.
s – 73 = 14 + 19 – 25
s = 81
81 ft

D.
s – 14 – 19 – 25 = 73
s = 131
131 ft

Respuesta :

metchelle
The perimeter is the sum of all sides. Since three of the four sides are already given, these values are subtracted from the perimeter to look for the measure of the fourth side. This is shown below:

p = s1 + s2 + s3 + s4
73 = 14 + 19 + 25 + s4
s4 = 73 - 14 - 19 - 25
s4 = 15 ft

Among the choices, the correct answer is A.

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