SOLUTION: An 8-inch By 10-inch Photo Is Being Reduced Proportionally. The 10-inch Side Is Reduced By X Inches. What Is The CHANGE In The Area In Terms Of X?

Question 1012389: An 8-inch By 10-inch Photo Is Being Reduced Proportionally. The 10-inch Side Is Reduced By X Inches. What Is The CHANGE In The Area In Terms Of X?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
An 8-inch By 10-inch Photo Is Being Reduced Proportionally. The 10-inch Side Is Reduced By X Inches. What Is The CHANGE In The Area In Terms Of X?
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New area = (10 - x)*(8 - 0.8x) = 0.8x^2 - 10.8x + 80 sq inches
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Change = 80 - (0.8x^2 - 10.8x + 80)
= 10.8x - 0.8x^2
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