Question

Тетрадь стоит x копеек,а конверт y капеек,сколько копеек стоят 3 тертади и 4 конверта? Есть два варианта А(x+y).7 И Б(x•3+y•4 какой из них правильный? И можно решение?

Answer 1

Ответ:

Буква А правильно надеюсь помогла

Answer 2

Ответ:

правильный вариант 2, ну это же элементарно

Answer 3

Problem Analysis

We are given that a notebook costs x kopecks and an envelope costs y kopecks. We need to find the total cost of 3 notebooks and 4 envelopes. We have two options for calculating the total cost: A) (x + y) * 7 and B) (x * 3) + (y * 4). We need to determine which option is correct and provide the solution.

Solution

To find the total cost of 3 notebooks and 4 envelopes, we can use option B: (x * 3) + (y * 4). This option correctly accounts for the individual costs of each item and then adds them together.

Therefore, the total cost of 3 notebooks and 4 envelopes is (x * 3) + (y * 4) kopecks.

Please note that the specific values of x and y are not provided in the question, so we cannot calculate the exact total cost without knowing their values.

I hope this helps! Let me know if you have any further questions.