1)20 hours and 2)30 hours
To get the length of AC, you would add AB to BC
AB = 3x
BC = 2x +3
Add together:
3x + 2x +3 = 5x +3
The answer is A.
Normally it would be written in standard from unless specified otherwise.
In order to find the x and y intercepts of an equation, you can plug in 0 for the opposite variable. Let us solve for the intercepts now.
<span>x-intercept
</span>We are going to plug in 0 for y and the solve for x:
![3x+6y=18](https://tex.z-dn.net/?f=3x%2B6y%3D18)
![3x+6(0)=18](https://tex.z-dn.net/?f=3x%2B6%280%29%3D18)
![3x=18](https://tex.z-dn.net/?f=3x%3D18)
![x=6](https://tex.z-dn.net/?f=x%3D6)
So now we know the
x-intercept of the line is: (6, 0)<span>
y-intercept</span>
We are going to plug in 0 for x and solve for y:
![3x+6y=18](https://tex.z-dn.net/?f=3x%2B6y%3D18)
![3(0)+6y=18](https://tex.z-dn.net/?f=3%280%29%2B6y%3D18)
![6y=18](https://tex.z-dn.net/?f=6y%3D18)
![y=3](https://tex.z-dn.net/?f=y%3D3)
So now we know that
the y-intercept for the line is: (0, 3)