Marcia is at a store with a 20% off sale. She also has a coupon for an additional 10% off the sale price. Prove or disprove the following statement: A 20% discount on the original price of an item, followed by the use of a 10% off coupon, results in a total discount of 30%.

I wil anyone who answers this right with explination

False

Step-by-step explanation:

I will use an example here:

Original price of a pc is $799

you use your 20% off coupon which will bring it down:

799 decrease 20% =

799 × (1 - 20%) = 799 × (1 - 0.2) = 639.2

then you use your 10% off coupon:

639.2 decrease 10% =

639.2 × (1 - 10%) = 639.2 × (1 - 0.1) = 575.28

our final price doing them separately is $575.28

while doing it in one step by subtracting 30%:

799 decrease 30% =

799 × (1 - 30%) = 799 × (1 - 0.3) = 559.3

our price by doing it with a 30% discount is $559.30

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step-by-step explanation:

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