The distnace around a two dimensional shape
chile anyways so hehhejjakwkw
7x-5y=21 when x=4 from the coordinate point of (4,y)
Next,
7x-5y=21
Substitute x with 4
7(4)-5y=21
28-5y=21
Add 5 to each side
28-5y+5y=21+5y
28=21+5y
Subtract 21 to each side
28-21=21+5y-21
7=5y
Divided 5 to each side
7/5=5y/5
y=7/5
Or
y=1 2/5
Check:
7x-5y=21
Substitute x with 4 and y with 7/5
7(4)-5(7/5)=21
28-7=21
21=21. As a result, (4,7/5) is your correct answer. Hope it help!
Answer:
-14
Step-by-step explanation:
Given:
The graph of linear function.
To find:
The slope intercept form of the linear equation from the given graph.
Solution:
The slope intercept form of a linear function is:
![y=mx+b](https://tex.z-dn.net/?f=y%3Dmx%2Bb)
From the given graph it is clear that the graph passes through the points (1,300) and (4,800).
The equation of line is
![y-y_1=\dfrac{y_2-y_1}{x_2-x_1}(x-x_1)](https://tex.z-dn.net/?f=y-y_1%3D%5Cdfrac%7By_2-y_1%7D%7Bx_2-x_1%7D%28x-x_1%29)
![y-300=\dfrac{800-300}{4-1}(x-1)](https://tex.z-dn.net/?f=y-300%3D%5Cdfrac%7B800-300%7D%7B4-1%7D%28x-1%29)
![y-300=\dfrac{500}{3}(x-1)](https://tex.z-dn.net/?f=y-300%3D%5Cdfrac%7B500%7D%7B3%7D%28x-1%29)
![y-300=\dfrac{500}{3}x-\dfrac{500}{3}](https://tex.z-dn.net/?f=y-300%3D%5Cdfrac%7B500%7D%7B3%7Dx-%5Cdfrac%7B500%7D%7B3%7D)
Adding 300 on both sides, we get
![y=\dfrac{500}{3}x-\dfrac{500}{3}+300](https://tex.z-dn.net/?f=y%3D%5Cdfrac%7B500%7D%7B3%7Dx-%5Cdfrac%7B500%7D%7B3%7D%2B300)
![y=\dfrac{500}{3}x+\dfrac{900-500}{3}](https://tex.z-dn.net/?f=y%3D%5Cdfrac%7B500%7D%7B3%7Dx%2B%5Cdfrac%7B900-500%7D%7B3%7D)
![y=\dfrac{500}{3}x+\dfrac{400}{3}](https://tex.z-dn.net/?f=y%3D%5Cdfrac%7B500%7D%7B3%7Dx%2B%5Cdfrac%7B400%7D%7B3%7D)
Therefore, the required equation is
.