Answer: (a). M=7x180+39+700. (B) $731
Step-by-step explanation:
slope intercept form = y=mx +b
where m would be the slope and b is the y intercept
equations would be:
cool cars: y = 179x +1999
awesome autos: y = 249x
Answer:
-20...........................
Answer:
is there supposed to be a picture with it? i can't solve it without more information. sorry
Answer:
![(d)\ x = 4](https://tex.z-dn.net/?f=%28d%29%5C%20x%20%3D%204)
Step-by-step explanation:
Given
![f(x) = -x^2 + 4x + 12](https://tex.z-dn.net/?f=f%28x%29%20%3D%20-x%5E2%20%2B%204x%20%2B%2012)
![g(x) = x + 8](https://tex.z-dn.net/?f=g%28x%29%20%3D%20x%20%2B%208)
Required
Find x such that: ![f(x) = g(x)](https://tex.z-dn.net/?f=f%28x%29%20%3D%20g%28x%29)
This gives:
![-x^2 + 4x + 12 = x+8](https://tex.z-dn.net/?f=-x%5E2%20%2B%204x%20%2B%2012%20%3D%20x%2B8)
Collect like terms
![-x^2 + 4x -x + 12 -8=0](https://tex.z-dn.net/?f=-x%5E2%20%2B%204x%20-x%20%2B%2012%20-8%3D0)
![-x^2 + 3x +4 =0](https://tex.z-dn.net/?f=-x%5E2%20%2B%203x%20%2B4%20%3D0)
Expand
![-x^2 + 4x - x+4 =0](https://tex.z-dn.net/?f=-x%5E2%20%2B%204x%20-%20x%2B4%20%3D0)
Factorize
![x(x - 4) - 1(x-4) = 0](https://tex.z-dn.net/?f=x%28x%20-%204%29%20-%201%28x-4%29%20%3D%200)
Factor out x - 1
![(x- 1)(x - 4)=0](https://tex.z-dn.net/?f=%28x-%201%29%28x%20-%204%29%3D0)
Solve:
![x =1\ or\ x = 4](https://tex.z-dn.net/?f=x%20%3D1%5C%20or%5C%20x%20%3D%204)