Question

Для библиотеки купили 7 одинаковых шкафов за с р. Запиши выражения которые показывают: 1) сколько рублей надо уплатить за 9 таких шкафов; 2) сколько таких шкафов можно купить на к р.

Answer 1

1)
с/7*9
2)к/(с/7) это и есть ответы

Answer 2

Calculations for the Purchase of Identical Cabinets

To calculate the total cost for 9 identical cabinets and the number of cabinets that can be purchased for a certain amount, we can use the information provided.

1) Total Cost for 9 Identical Cabinets: To calculate the total cost for 9 identical cabinets, we can use the information that 7 identical cabinets were purchased for a certain amount.

The expression to calculate the total cost for 9 identical cabinets is: Total Cost = Cost per cabinet × Number of cabinets

Using the information provided, we can calculate the total cost for 9 identical cabinets.

The cost per cabinet is given as "7 for a ruble".

Therefore, the expression to calculate the total cost for 9 identical cabinets is: Total Cost = (1 ruble / 7 cabinets) × 9 cabinets

Calculating the total cost: Total Cost = (1 / 7) × 9 = 1.2857 rubles

So, the total cost for 9 identical cabinets is approximately 1.2857 rubles.

2) Number of Cabinets for a Certain Amount: To calculate the number of cabinets that can be purchased for a certain amount, we can use the information provided.

The expression to calculate the number of cabinets that can be purchased for a certain amount is: Number of cabinets = Total amount / Cost per cabinet

Using the information provided, we can calculate the number of cabinets that can be purchased for a certain amount.

The cost per cabinet is given as "7 for a ruble".

Therefore, the expression to calculate the number of cabinets that can be purchased for a certain amount is: Number of cabinets = Total amount / (1 ruble / 7 cabinets)

Let's assume the total amount is represented by the variable 'k'.

The expression becomes: Number of cabinets = k / (1 / 7)

So, the number of cabinets that can be purchased for a certain amount 'k' is 7k.

Therefore, for a certain amount 'k' rubles, the number of cabinets that can be purchased is 7k.