Question

ПОЖАЛУЙСТА ОЧЕНЬ СРОЧНО ДАЮ 60 БАЛЛОВ Катя купила 3,5 тыс заколок и 1,25 тыс невидимок, заплатила за все 9,25 тысяч рублей, стоимость 1 невидимки в 1,5 раза меньше стоимости 1 заколки. Сколько стоит 1 заколка и 1 невидимка​

Answer 1

1.5х  руб. стоит 1 заколка , если 1 невидимка​  х руб.

тогда по условию задачи

3.5*1.5х+1.25*х=9.25

х*(5.25+1.25)=9.25

6.5х=9.25

х=9.25/6.5

х=37/26=1  11/26

невидимка стоит 1  11/26 руб. а заколка (37/26)*3/2=111/52=2 7/52(руб)

Answer 2

Calculating the Cost of Hairpins and Invisible Hairpins

To calculate the cost of 1 hairpin and 1 invisible hairpin, we can use the given information. Let's denote the cost of 1 hairpin as x and the cost of 1 invisible hairpin as y.

Given: - Katya bought 3.5 thousand hairpins and 1.25 thousand invisible hairpins. - She paid a total of 9.25 thousand rubles for all the hairpins. - The cost of 1 invisible hairpin is 1.5 times less than the cost of 1 hairpin.

We can set up the following equations based on the given information: 1. 3.5x + 1.25y = 9.25 (total cost equation) 2. y = 0.5x (cost ratio equation)

Solving for the Cost of 1 Hairpin and 1 Invisible Hairpin

First, we can use the cost ratio equation to express the cost of 1 invisible hairpin in terms of the cost of 1 hairpin: y = 0.5x

Substitute the value of y from the cost ratio equation into the total cost equation: 3.5x + 1.25(0.5x) = 9.25 3.5x + 0.625x = 9.25 4.125x = 9.25 x = 9.25 / 4.125 x ≈ 2.24

Now that we have found the cost of 1 hairpin, we can calculate the cost of 1 invisible hairpin using the cost ratio equation: y = 0.5 * 2.24 y ≈ 1.12

Answer

So, the cost of 1 hairpin is approximately 2.24 thousand rubles and the cost of 1 invisible hairpin is approximately 1.12 thousand rubles.