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Iteru [2.4K]
3 years ago
7

The value of a car purchased for $20,000 decreases at a rate of 12% per year. What will be the value of the car after 3 years?

Mathematics
1 answer:
DENIUS [597]3 years ago
4 0

Answer:

The answer is A

Step-by-step explanation:

$20,000 • .12= $2,400

$2,400 • 3= $7,200

$20,000 - $7,200= $12,800

$12,800

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You only have to apply the theorem of Pythagoras here. Remember the square on the hypotenuse (the longest side) is equal to the sum of the squares on the other two sides :

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The next cases are exactly the same thing so there is no need for explanation :

2.

AB is the hypotenuse here because it is the biggest side clearl :

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we just subtracted 15² on each side of the equation

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4.

AB is the hypotenuse,

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AB² = AC² + BC²

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b² = 78² - 30²

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