Combine the like terms.
-3x^2 - (-x^2) = -3x^2 + x^2 = -2x^2
4x - (-4x) = 4x +4x = 8x
The difference would be: -2x^2 + 8x - 1
Answer:
2/3x - 3 = 5
Step-by-step explanation:
Let x be the number
2/3x - 3 = 5
Add 3 to each side
2/3x-3+3 = 5+3
2/3x = 8
Multiply each side by 3/2
3/2*2/3x = 8*3/2
x = 12
Answer:
d. y ˆ =269,000−8300x
Step-by-step explanation:
If the regression describes the amount of dollars left after a single donation as a function of time, the regression must consist of a positive lump sum subtracted by an yearly rate. This rules out alternatives a, c, and e.
Since this equation must represent the amount left after 10 years, it must yield a positive value up to at least x = 10.
For equation b., when x = 10:
![y=69,000-8,300*10\\y=-14,000](https://tex.z-dn.net/?f=y%3D69%2C000-8%2C300%2A10%5C%5Cy%3D-14%2C000)
For equation d., when x = 10:
![y=269,000-8,300*10\\y=186,000](https://tex.z-dn.net/?f=y%3D269%2C000-8%2C300%2A10%5C%5Cy%3D186%2C000)
Therefore, the only possible answer is d. y ˆ =269,000−8300x
Answer: x-3y+21=0
Step-by-step explanation:
move the constant to the left then divide both sides then booom