Question

1-(9.5+12.9)/3.2 2-Пылесос стоил 7000рублей.На распродаже его цену снизили на 12%. Какова его цена на распродаже

Answer 1

1) (9,5+12,9) ÷ 3,2 = 22,4 ÷ 3,2 = 224 ÷ 32 = 7

2) 7000 ÷ 100 = 70 (руб.) - 1%.

70 × 12 = 840 (руб.) - 12%.

7000 - 840 = 6160 (руб.) - цена пылесоса на распродаже.

Ответ: 6160.

Answer 2

To calculate the expression 1-(9.5+12.9)/3.2, we can follow the order of operations (PEMDAS/BODMAS):

1. Add the numbers inside the parentheses: 9.5 + 12.9 = 22.4.
2. Divide the sum by 3.2: 22.4 / 3.2 = 7.
3. Subtract the result from 1: 1 - 7 = -6.

Therefore, the value of the expression 1-(9.5+12.9)/3.2 is -6.

Regarding the second question, let's calculate the price of the vacuum cleaner after the discount:

1. Subtract 12% from 100% to find the discount factor: 100% - 12% = 88%.
2. Multiply the original price by the discount factor to find the reduced price: 7000 * 88% = 6160 rubles.

Therefore, the price of the vacuum cleaner on sale is 6160 rubles.