For an isosceles triangle with a circumference of 10 cm, the functional relationship between the waist length y (CM) and the base length x (CM) is? What is the value range of the independent variable x?

x+2y=10
Zero
Job help users 2017-10-22
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Given that the circumference of isosceles triangle is 20, find the function analytic formula between the base edge length y and waist length x, and point out the value range of the independent variable x

From the known: y + 2x = 20, that is: y = 20-2x

Suppose the circumference of an isosceles triangle is 45, the waist is x, and the bottom is y. then the functional relationship between X and Y is obtained to determine the value range of the independent variable x When x = 15, y =? And point out what triangle is at this time?

y=45-2x. 11.25 ＜x＜22.5.

If the circumference of an isosceles triangle is 24, the base length is x, and the waist length is y, then the functional relationship of Y with respect to X is The value range of the independent variable x is RT

Y = (24-x) / 2 the X range is determined by the sum of the two sides being greater than the third and the difference between the two sides being less than the third
In other words, 24-x > x (the sum of two waist is greater than the bottom, and the sum of bottom and one waist is always greater than that of one waist)
X < 12, the other several difference calculation can get x > 0, so the range is 0
Job help users 2017-10-30
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Given that the circumference of isosceles triangle is 12, let its waist length be x and its bottom edge be y, then the analytic formula of y about X is__ The domain of this function is_ . Given that the circumference of an isosceles triangle is 16, let its waist length be x and its bottom edge be y, then the analytic formula of y about X is__ The domain of this function is_ . == wrong. It's 16

y=12-2x
By 0

In the isosceles triangle with a circumference of 15 cm, the waist length is x and the bottom side length is y. write the function analytic formula of X about y and the definition domain of the function

2X + y = 15, y = 15-2x the definition domain is that x is greater than 4 / 15

In an isosceles triangle with a circumference of 15 cm, the base length is x cm and the waist length is y cm. Write the function analytic formula of y about X and the definition domain of the function

According to the meaning of the title
2y+x=15
y=-x/2+15/2
Zero

The circumference of an isosceles triangle is 100 cm, the waist length is xcm, and the bottom edge is YCM. The functional relationship between Y and X is written and the definition domain of the function is obtained

Circumference = waist length + waist length + bottom edge
100 =x +x +y
That is, y = 100-2x
The definition domain should satisfy: the sum of two sides is greater than the third side,
①x+y>x ②x+x>y
That is, ① y = 100-2x > 0 is X

Given that the circumference of an isosceles triangle is 20 (1) write the analytic formula of the function of the bottom edge y with respect to the waist length x; 2) write the value range of the independent variable x; 3) draw the function image

（1）y=20-2x
(2) 2X > 20-2x and 20-2x > 0
Solution: 5 (3) draw by yourself, first draw the x-axis and y-axis
This is a line segment with a negative slope in the first quadrant. X is between 5 and 10. Connect the two points (5,10) and (10,0), which is the line segment. Note that the two endpoints are hollow and cannot take those two values

If the circumference of an isosceles triangle is 30, the waist length is x, and the bottom edge is y, then the relationship between Y and X is The value range of X is .

From the meaning of the title, 2x + y = 30,
Then y = - 2x + 30,
According to the relationship between the three sides of a triangle, we can get the following results:
x+x＞−2x+30
−2x+30＞0 ，
The solution is: 15
2＜x＜15，
So the answer is: y = - 2x + 10, 15
2＜x＜15．

For an isosceles triangle with a circumference of 10 cm, the functional relationship between the waist length y (CM) and the base length x (CM) is? What is the value range of the independent variable x?