Step-by-step explanation:
According to the pythagrean equation, it should be

8² = 6² + BC²
64 = 36 + BC²
BC² = 28
BC = ✓28 = 5.29
distribute the 8 to the 5 and x. then distribute 11 to 9 and x.
(40+8x)=(99+11x)
-11x -11x
-3x+40=99
-40 -40
-3x= 59
divide three on both sides
x=59/-3
final answer x=-59/3
Answer:
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Step-by-step explanation:
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Amount decrease = 380 - 225 = 155
percent = 115/380 * 100 = 40.8 %