Answer is A i hope it helps
Answer: Where are the lines?
Let n be the amount of time it takes william to cut the lawn. Then Shelly takes
n-2 hours. So:
1/n+1/n-2=1/3
3(n-2)+3n=n²-2n
6n-6=n²-2n
n²-8n+6=0
Using the quadratic formula, we get a positive value of 7.1623 hrs as the amount of time william takes working alone, and 5.1623 as the amount of time Shelly takes working alone
☺☺☺☺
is the equation best represents the line.
Solution:
Take any two points on the line.
Let the points be (0, –4) and (4, 7).
![x_1=0,y_1=-4,x_2=4, y_2=7](https://tex.z-dn.net/?f=x_1%3D0%2Cy_1%3D-4%2Cx_2%3D4%2C%20y_2%3D7)
General form of equation of a line is y = mx + c
where m is the slope and c is the y-intercept of the line.
<em>y-intercept is the point which line crosses at y-axis.</em>
In the given line, y-intercept is 4.
c = 4
Slope of the line:
![$m=\frac{y_2-y_1}{x_2-x_1}](https://tex.z-dn.net/?f=%24m%3D%5Cfrac%7By_2-y_1%7D%7Bx_2-x_1%7D)
![$m=\frac{7-(-4)}{4-0}](https://tex.z-dn.net/?f=%24m%3D%5Cfrac%7B7-%28-4%29%7D%7B4-0%7D)
![$m=\frac{11}{4}](https://tex.z-dn.net/?f=%24m%3D%5Cfrac%7B11%7D%7B4%7D)
Equation of the line:
y = mx + c
![y=\frac{11}{4}x +4](https://tex.z-dn.net/?f=y%3D%5Cfrac%7B11%7D%7B4%7Dx%20%2B4)
Hence
is the equation best represents the line.