The leg length of a basketball player accounts for 4 9 of height, which is measured here in units of

The leg length of a basketball player accounts for 4 9 of the height, which is measured here in (the height of the player)."1”。

Unit one is a standard quantity, so an invariant is usually chosen as unit one.

Definition of Unit One.

The concept of arithmetic, also known as the whole "1". At present, there is no formal definition, only a descriptive definition that is widely used in the practice of teaching fractions: a complete quantity (such as a distance, a project, a basket of apples, a book, a period of time, etc.) or a number (positive number) is regarded as a whole or a unit, and the natural number 1 is given the characteristic of "1".

The mathematical significance of unit one.

The unit of the original quantity (refers to the smaller amount that makes up the original quantity, such as a journey that is completed in 3 hours, and the average distance traveled per hour is a unit of a distance.) Or the unit of number can be converted into a unit smaller than "1", so there is a fraction definition:

Dividing Unit One (or the whole "1") into equal parts indicates that the number of one or more parts of it is a fraction.

You can redefine a quantity in units of "1" and represent it as a fraction. This fraction is also often referred to as the corresponding fraction of that other quantity.

The method of generating fractions is usually called the fractionation method, and the method of generating fractions is called the ratio method. In the segmentation method, "1" is in the numerator position, and in the quantity ratio method, "1" is in the denominator position.

An example is as follows: Example 1In an exam in class 61, the number of students who passed was 3 4 of the number of students in the class, and later found that the scores of 3 students were corrected incorrectly, and the number of students who passed after correction was 2 3 of the number of students in the class, and the number of students in class 61 was found.

The unit of this question is the number of students in class 61.

Example 2: The number of students in class 61 is 3 4 of the number of class 62, and 3 students are transferred from class 61 to class 62, the number of students in class 61 is 2 3 of class 62, and the number of students in class 61 is the original number of class 61.

The unit of this question is the number of people in two classes.

Example 3: The boys in the 61 class are the 3 4 of the girls, and 3 boys are gone. The number of boys is 2 3 of the girls, ask for the original boys.

The unit of this question is the number of female students.

The leg length of a basketball player accounts for 4 9 of height, which is measured here as "1" in total height.

Proportion usually refers to the relationship between the size, width, and height of the shapes between objects. In addition, proportions are also used in composition, for example, when drawing a sketch of a still life, it is necessary to pay attention to the size of all the still lifes occupying the picture.

An athlete is a person who has higher than ordinary physical conditions, endurance, agility, etc., and is also good at sports because of the above conditions. In a more specific perspective, an athlete refers to people who play professional sports.

It should be based on "height".

The first question is easy to answer, because the parabola opening is downward, so the maximum value is the ordinate of the vertex, which can be known from the function expression, and the vertex coordinate is (0, so the maximum height that the ball can reach is meters.

The second question is a bit more difficult.

First of all, if the ball doesn't go in, this problem can't be calculated.

So, the following calculations are based on the premise that the ball is thrown.

If the ball is thrown, then the height of the basket is meters, and you can calculate how much the abscissa is at this time, and the calculation is as follows:

Solution, x1 = x2= (both values can be used, only x1 is used here) There is another condition in the problem, the person is 4 meters away from the blue plate, then the abscissa where the person is located should be: 4 - =

The ball is shot at this time, then the height of the ball is:

y = height above the ground is the height of the ball minus the height of the ball above the person and then minus the height of the person h= - =

So when the ball is shot, the height at which the player jumps off the ground is meters.

Summary. The equation is (182 4+x) 5-x=8 The average height of the four players in the basketball team is 182 cm, and the height of the other player is 8 cm shorter than the average height of the five players.

Hello dear, make sure you made sure you copied the question correctly, right?

No. Okay, pro, wait a minute.

We can solve this problem with equations.

Set the player's height to x

The equation is (182 4+x) 5-x=8

I hope mine is helpful to you and I wish you a happy life!

The average height of the four players in the basketball team is 182 centimeters, and the height of the other player is 8 centimeters shorter than the average height of the five players.

Hello, the average height of the four players in the basketball team is 182 cm, and the height of the other team member is 8 cm shorter than the average height of the five team members, and the height of this team member is 174 cm. Cleanup the cheats.

The height of a basketball player is meters, where the torso is about three-eighths of the height, and the unit 1 is three-eighths of the height (the height is divided into 8 parts, and the torso part accounts for 3 of them).

Solution: Set another player's balance to make the sale high for Y

182x4+y）/5-8=y

Solution: y=172

The total height of the 6 team members is 6*182=1092;

With one new player, there are 7 players in total, with a total height of 7*181=1267;

The extra part is 1267-1092=175, which is the height of the new player.

Calculate the answer

The result is 175 thanks.