Question

Две краски надо смешать так,что бы одной из них было на 30проц.больше,чем другой.Сколько процентов смеси составит каждая краска?Цена конфет повысилась на 5 проц..Найдите новую цену конфет, если прежняя составляла: а)120 руб. б)160руб. в)140руб. г)180 руб.

Answer 1

X+30%/100+30%:5
Как то так

Answer 2

1. 35% и 65%
2.а)126
б)168
в)147
г)189

Answer 3

Mixing Two Paints

To determine the percentage of each paint in the mixture, we can set up the following equation:

Let's assume the amount of one paint is represented by x. Then the amount of the other paint will be x + 30% of x (which is 0.3x).

The total amount of the mixture will be the sum of the two paints: x + (x + 0.3x) = 2x + 0.3x = 2.3x.

To find the percentage of each paint in the mixture, we can divide the amount of each paint by the total amount of the mixture and multiply by 100.

Let's solve this equation step by step:

1. Let's assume the total amount of the mixture is 100 units. 2. The amount of one paint will be x units. 3. The amount of the other paint will be x + 30% of x units (which is 0.3x units). 4. The total amount of the mixture will be 2.3x units. 5. To find the percentage of each paint in the mixture, we can divide the amount of each paint by the total amount of the mixture and multiply by 100.

Let's calculate the percentage of each paint in the mixture:

- The percentage of the first paint: (x / 2.3x) * 100 = 100 / 2.3 ≈ 43.48%. - The percentage of the second paint: ((x + 0.3x) / 2.3x) * 100 = 1.3x / 2.3x * 100 ≈ 56.52%.

Therefore, one paint will make up approximately 43.48% of the mixture, while the other paint will make up approximately 56.52% of the mixture.

Increase in Candy Prices

To find the new price of the candies after a 5% increase, we can use the following formula:

New Price = Old Price + (Old Price * Percentage Increase)

Let's calculate the new prices for each scenario:

a) For candies that originally cost 120 rubles: New Price = 120 + (120 * 0.05) = 120 + 6 = 126 rubles.

b) For candies that originally cost 160 rubles: New Price = 160 + (160 * 0.05) = 160 + 8 = 168 rubles.

c) For candies that originally cost 140 rubles: New Price = 140 + (140 * 0.05) = 140 + 7 = 147 rubles.

d) For candies that originally cost 180 rubles: New Price = 180 + (180 * 0.05) = 180 + 9 = 189 rubles.

Therefore, the new prices for the candies will be: a) 126 rubles b) 168 rubles c) 147 rubles d) 189 rubles.