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Marielle was in an accident. She was traveling down a road at 36 mi/h when she slammed on her brakes. Her car left two skid marks that averaged 50 ft in length with a difference of 4 ft between them. Her brakes were operating at 80% efficiency at the time of the accident. What were the lengths of each skid mark?

Respuesta :

Answer: 52 ft and 48 ft

Step-by-step explanation:

x = length of one skidmark

x - 4 = length of the other skidmark

(x + (x - 4)) / 2 = 50      (average of the 2 skid marks is 50)

2x - 4 = 100

2x = 104

x = 104/2 = 52

52 - 4 = 48

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