1. A = area of frame; s = length; w = width
2. A = 15^2 - (15 - 2(2))^2 = 225 - 121 = 104
3. A = 18^2 - (18-2(3))^2 = 324 - 144 = 180 --> 180 square inches *20 cents = 3600 cents = $36
Answer:
1) A is area of frame, s is the length of the frame, and w is the width of the frame
2) just plug in the numbers. 15 for s and 2 for w. you get 104
3) the area would be 180 so she would charge $36
Explanation:
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