Question

Помогите срочно!!!! В стаде дельфинов 9 детёнышей ,что меньше числа самок в 3 раза .Общее число самок и детёнышей больше числа мужских особей в 2 раза.Сколько мужских особей в стаде?

Answer 1

9.3=27это число самок дельфина. 9+27=36 это самок и детенышей вместе 36:2=18число муж осыбей

Answer 2

1.9×3= 27- самок
2.9+27=36-самок и детенышей вместе
3.36÷2=18- мужских особей

Answer 3

Problem Analysis

We are given the following information about a dolphin pod: - There are 9 dolphin calves (baby dolphins) in the pod. - The number of female dolphins is three times less than the number of calves. - The total number of females and calves is twice the number of male dolphins.

We need to determine the number of male dolphins in the pod.

Solution

Let's break down the information given and solve the problem step by step.

1. Let's assume the number of female dolphins is x. 2. The number of calves is given as 9. 3. The number of female dolphins is three times less than the number of calves, so we can write the equation: x = 9 - 3x.

To find the value of x, we can solve this equation.

Solving the Equation

Let's solve the equation x = 9 - 3x to find the value of x.

Adding 3x to both sides of the equation: 4x = 9

Dividing both sides of the equation by 4: x = 9/4

Since we cannot have a fraction of a dolphin, we need to round the value of x to the nearest whole number. In this case, x = 2.

Now that we know the number of female dolphins, we can find the number of male dolphins.

The total number of females and calves is twice the number of male dolphins. Let's denote the number of male dolphins as y.

The equation for this relationship is: x + 9 = 2y.

Substituting the value of x (2) into the equation: 2 + 9 = 2y

Simplifying the equation: 11 = 2y

Dividing both sides of the equation by 2: y = 11/2

Since we cannot have a fraction of a dolphin, we need to round the value of y to the nearest whole number. In this case, y = 6.

Therefore, there are 6 male dolphins in the pod.

Answer

There are 6 male dolphins in the pod.