Question

Помогите срочно! 20 баллов! 6 заданий. СРОЧНО!!!!!! умножить *. разделить : 1. Выполните действия = 6,5*0,16-1,36:1,7+1,3 2. Решите задачу. Собранный крыжовник разложили в три корзины. В первую положили 12,8 кг ягод; во вторую в 1,3 раза больше, чем в первую, а в третью на 4,54 кг меньше, чем во вторую. Сколько всего килограммов крыжовника собрали? 3. Решите задачу: Для учащихся было куплено 90 билетов в театр. билеты на места в партере составляли 60% всех купленных билетов. сколько билетов было куплено на места в партере ? 4. Решите задачу. Доску длиной 215,16 см распилили на две части. Одна часть больше другой в 2,3 раза. Какова длина каждой части? 5. Решите уравнение. 8,7*y-4,5*y=10,5 6. Начертите угол МКN,равный 140.Лучом КР разделите этот угол на два угла так,чтобы угол PКN был равен 55.Вычислите градусную меру угла МКР. Помогите пожалуйста, мне надо срочно!!!!!!!

Answer 1

1)1.54
2) 1) 12.8* 1,3 = 16.64(кг)- 2-ая корзина.
     2) 16.64-4.54= 12.1(кг) 3-я корзина.
     3) 12.8+ 16.64+ 12.1= 41.54(кг) собрали.
3)90\100*60=54
4)х см - длина одной доски.  2,3х (см) -  длина второй доски.  х + 2,3х ( см )  - сумма длин всех частей  х + 2,3х = 215,16  3,3х = 215,16  х = 215,16 : 3,3 х = 65,2 (см) - длина 1-ой части.  65,2 * 2,3 = 149,96 (см) - длина 2-ой части.    Ответ: длина 1-ой части 65,2 см, длина 2-ой части 149,96 см.  
5) 1)8.7-4.5= 4.2
    2)10.5:4.2= 2.5
6) 85

Answer 2

Task 1: Multiplication and Division

To solve the expression 6.5 * 0.16 - 1.36 / 1.7 + 1.3 + 2, we need to follow the order of operations (PEMDAS/BODMAS).

1. First, we perform the multiplication: 6.5 * 0.16 = 1.04. 2. Then, we perform the division: 1.36 / 1.7 = 0.8. 3. Next, we add the results: 1.04 - 0.8 = 0.24. 4. Finally, we add the remaining numbers: 0.24 + 1.3 + 2 = 3.54.

Therefore, the result of the expression is 3.54.

Task 2: Calculating the Total Weight of Currants

In this task, we are given the weights of currants distributed into three baskets. Let's calculate the total weight of the currants.

1. The weight of currants in the first basket is given as 12.8 kg. 2. The weight of currants in the second basket is 1.3 times greater than the weight in the first basket. Therefore, the weight in the second basket is 12.8 * 1.3 = 16.64 kg. 3. The weight of currants in the third basket is 4.54 kg less than the weight in the second basket. Therefore, the weight in the third basket is 16.64 - 4.54 = 12.1 kg.

To find the total weight of the currants, we add the weights of all three baskets: 12.8 + 16.64 + 12.1 = 41.54 kg.

Therefore, the total weight of the currants collected is 41.54 kg.

Task 3: Calculating the Number of Tickets in the Parterre

In this task, we are given that 90 tickets were purchased for a theater performance, and 60% of these tickets were for seats in the parterre. Let's calculate the number of tickets purchased for seats in the parterre.

1. The total number of tickets purchased is given as 90. 2. The percentage of tickets for seats in the parterre is 60%. 3. To find the number of tickets purchased for seats in the parterre, we multiply the total number of tickets by the percentage: 90 * 0.6 = 54.

Therefore, 54 tickets were purchased for seats in the parterre.

Task 4: Calculating the Length of Each Part

In this task, we are given that a board with a length of 215.16 cm was divided into two parts, with one part being 2.3 times longer than the other. Let's calculate the length of each part.

1. The total length of the board is given as 215.16 cm. 2. Let's assume the length of the shorter part is x cm. 3. The length of the longer part is 2.3 times the length of the shorter part. Therefore, the length of the longer part is 2.3x cm. 4. The sum of the lengths of the two parts is equal to the total length of the board: x + 2.3x = 215.16. 5. Combining like terms, we have 3.3x = 215.16. 6. Dividing both sides of the equation by 3.3, we find x = 65.2. 7. Therefore, the length of the shorter part is 65.2 cm, and the length of the longer part is 2.3 * 65.2 = 150.16 cm.

Therefore, the length of each part is 65.2 cm and 150.16 cm.

Task 5: Solving the Equation

In this task, we are given the equation 8.7y - 4.5y = 10.5. Let's solve for y.

1. Combining like terms on the left side of the equation, we have (8.7 - 4.5)y = 10.5. 2. Simplifying the left side of the equation, we have 4.2y = 10.5. 3. Dividing both sides of the equation by 4.2, we find y = 10.5 / 4.2 = 2.5.

Therefore, the solution to the equation is y = 2.5.

Task 6: Calculating the Angle Measure

In this task, we are asked to draw an angle MKN equal to 140 degrees. We are then asked to bisect angle MKN with ray KR to form an angle PKN equal to 55 degrees. Let's calculate the measure of angle MKR.

1. Angle MKR is formed by the bisecting ray KR and the original ray MK. 2. Since angle PKN is equal to 55 degrees, angle MKR is also equal to 55 degrees.

Therefore, the measure of angle MKR is 55 degrees.

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