Question

Не могу сделать 3 задачи.Помогите мне пж. 1. Сумма углов треугольника АВС равна 1800. Угол А на 400 больше угла В, а угол С на 200 меньше угла А. Найдите величину угла А. 2. Я провел год в деревне, в Москве и в дороге, и притом в Москве в 8 раз более времени, чем в дороге, а в деревне в 8 раз более, чем в Москве. Сколько дней провел я в дороге, в Москве и в деревне? В будущем (1892) году думаю провести в Петербурге столько минут, сколько часов проведу в деревне. Сколько времени проведу в Петербурге? 3. В булочной было 654 кг черного и белого хлеба. После того как продали 215 кг черного и 287 кг белого хлеба, того и другого сорта хлеба осталось поровну. Сколько килограммов черного и белого хлеба в отдельности было в булочной?

Answer 1

Третья задача
1. 215+287=502 кг всего продали белого и черного
2. 654-502=152 кг(белого и черного осталось после продажи)
3.152:2=76 кг и белого и черного
4. 76+215=291 кг было черного всего
5.76+287=363 кг белого всего

Answer 2

Task 1: Finding the angle A in a triangle

To find the value of angle A in triangle ABC, we are given the following information: - The sum of the angles in triangle ABC is 180 degrees. - Angle A is 400 degrees larger than angle B. - Angle C is 200 degrees smaller than angle A.

Let's solve this step by step:

1. Let's assume that angle B is x degrees. 2. According to the given information, angle A is 400 degrees larger than angle B, so angle A is (x + 400) degrees. 3. Angle C is 200 degrees smaller than angle A, so angle C is ((x + 400) - 200) degrees, which simplifies to (x + 200) degrees. 4. The sum of the angles in a triangle is 180 degrees, so we can write the equation: A + B + C = 180. 5. Substituting the values we found earlier, we get: (x + 400) + x + (x + 200) = 180. 6. Simplifying the equation, we have: 3x + 600 = 180. 7. Subtracting 600 from both sides of the equation, we get: 3x = -420. 8. Dividing both sides of the equation by 3, we find: x = -140.

Therefore, angle B is -140 degrees. However, angles in a triangle cannot be negative, so there seems to be an error in the given information or the problem itself.

Unfortunately, I couldn't find any additional information or sources to verify the given problem statement. It's possible that there may be a mistake in the problem or missing information. I recommend double-checking the problem statement or consulting with a teacher or instructor for clarification.

Task 2: Calculating time spent in different locations

To calculate the time spent in different locations, we are given the following information: - The time spent in Moscow is 8 times more than the time spent on the road. - The time spent in the village is 8 times more than the time spent in Moscow.

Let's solve this step by step:

1. Let's assume that the time spent on the road is x days. 2. According to the given information, the time spent in Moscow is 8 times more than the time spent on the road, so the time spent in Moscow is 8x days. 3. The time spent in the village is 8 times more than the time spent in Moscow, so the time spent in the village is 8 * 8x = 64x days. 4. To find the total time spent in all three locations, we add the time spent on the road, in Moscow, and in the village: x + 8x + 64x = 73x days.

Therefore, the total time spent in the road, Moscow, and the village is 73x days.

Regarding the future plan to spend as many minutes in St. Petersburg as hours spent in the village in the year 1892, it's not clear how many hours were spent in the village. Without that information, it's not possible to calculate the time spent in St. Petersburg accurately.

Task 3: Calculating the amount of black and white bread in a bakery

To calculate the amount of black and white bread in the bakery, we are given the following information: - Initially, there were 654 kg of black and white bread in the bakery. - After selling 215 kg of black bread and 287 kg of white bread, the remaining amounts of both types of bread are equal.

Let's solve this step by step:

1. Let's assume that the initial amount of black bread is x kg. 2. Since the initial amount of black and white bread combined is 654 kg, the initial amount of white bread is (654 - x) kg. 3. After selling 215 kg of black bread, the remaining amount of black bread is (x - 215) kg. 4. After selling 287 kg of white bread, the remaining amount of white bread is ((654 - x) - 287) kg, which simplifies to (367 - x) kg. 5. According to the given information, the remaining amounts of black and white bread are equal, so we can write the equation: (x - 215) = (367 - x). 6. Solving the equation, we have: 2x = 582. 7. Dividing both sides of the equation by 2, we find: x = 291.

Therefore, the initial amount of black bread in the bakery was 291 kg, and the initial amount of white bread was (654 - 291) = 363 kg.

Please note that the sources provided did not contain any relevant information for these specific tasks. The solutions provided are based on the given information and logical reasoning.