Question

7. Ціна на автомобіль спочатку зменшилась на 30%, а потім підвищилася на 30%. Як змінилася ціна автомобіля?​

Answer 1

Примем цену автомобиля за А. Тогда:

1) А-0,3А = 0,7А – после уменьшения;

2) 0,7А+0,7А*0,3 = 0,91А – цена после увеличения;

3) А-0,91А=0,09А – цена уменьшилась на 9%.

Answer 2

Calculation of Price Change

To determine how the price of the car changed after it first decreased by 30% and then increased by 30%, we can use a simple calculation.

Let's assume the original price of the car is $100.

1. The price initially decreased by 30%, which means it decreased by 30% of $100 = $30. - The new price after the decrease is $100 - $30 = $70.

2. The price then increased by 30%, which means it increased by 30% of $70 = $21. - The new price after the increase is $70 + $21 = $91.

Therefore, the final price of the car is $91.

Please note that this calculation assumes a linear change in price and does not take into account any additional factors that may affect the actual price of the car.