Answer:
length of window = 3/5 ft
Step-by-step explanation:
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Cost of making one window (C) = $ 355
Cost of making a square window with length n inch is C = n(25) + 175
C = 25n + 175
By substituting the value of C and n in above equation:
355 = 25n + 175
25n = 355 - 175
25n = 180
n = 180/25
n = 36/5
Length of a square window in inches = 36/5
Length of a square window in feet = (∵ 1 inch = 1/12 feet)
Answer: 2.5 feet
The length of the purchased window is n = 30inches
Using rule: one feet is equal to 12inches, or one inch is equal to 1/12 feet, we get n = 30 x 1/12 feet = 30/12 which is equal to 2.5 feet
