Answer: The original price of washing machine is $250.
Step-by-step explanation:
Since we have given that
Rate of decline in normal prices = 17%
Amount of normal price reduced by = $42.50
Let the original price be x
According to question,

Hence, The original price of washing machine is $250.
Answer:
its already solved
Step-by-step explanation:
u solved.it already
Answer:
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Step-by-step explanation:
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I suppose you mean

Substitute y = √(9 + x). Solving for x gives x = y² - 9, so that 9 - x = 18 - y², and we have differential dx = 2y dy. Replacing everything in the integral gives

Simplify the integrand by dividing:


For the first term of this new integral, we have the partial fraction expansion


The rest is trivial:



