The equation you use for the slope of this kind of problem is (y2-y1)/(x2-x1). x1 is the first X coordinate, x2 is the second, y1 is the first y coordinate, y2 is the second.
(5-3)/(2-2)
2/0
This equation has an UNDEFINED SLOPE, as it is just a vertical line.
Answer: Your brother is 15 years old right now.
Step-by-step explanation:
Let be "m" your currently age and "b" your brother's currently age.
Knowing that right now he is three times (this indicates multiplication) as old as you, you can write the following equation:
![b=3m](https://tex.z-dn.net/?f=b%3D3m)
In five years your age will be:
![m+5](https://tex.z-dn.net/?f=m%2B5)
And your brother's age will be:
![b+5](https://tex.z-dn.net/?f=b%2B5)
Then, if in five years, your brother will be twice as old as you, you can set up the second equation:
![b+5=2(m+5)](https://tex.z-dn.net/?f=b%2B5%3D2%28m%2B5%29)
Then, the System of equations is:
![\left \{ {{b=3m} \atop {b+5=2(m+5)}} \right.](https://tex.z-dn.net/?f=%5Cleft%20%5C%7B%20%7B%7Bb%3D3m%7D%20%5Catop%20%7Bb%2B5%3D2%28m%2B5%29%7D%7D%20%5Cright.)
Apply the Substitution method and substitute the first equation into the second one and solve for "m":
![3m+5=2(m+5)\\\\3m+5=2m+10\\\\m=10-5\\\\m=5](https://tex.z-dn.net/?f=3m%2B5%3D2%28m%2B5%29%5C%5C%5C%5C3m%2B5%3D2m%2B10%5C%5C%5C%5Cm%3D10-5%5C%5C%5C%5Cm%3D5)
Substitute the value of "m" into the first equation and evaluate in order to find "b":
![b=3(5)\\\\b=15](https://tex.z-dn.net/?f=b%3D3%285%29%5C%5C%5C%5Cb%3D15)
Answer:
4.66666666667
Step-by-step explanation:
Hello there!
~I hope you and your family are staying safe and healthy!
![4x - 1 = 3](https://tex.z-dn.net/?f=4x%20-%201%20%3D%203)
We need to start by saying that y = 3
or ![4x - y = 1](https://tex.z-dn.net/?f=4x%20-%20y%20%3D%201)
Thus, the equation above is in the two variable form where y = 3
Thus, the required equation is ![4x - y = 1](https://tex.z-dn.net/?f=4x%20-%20y%20%3D%201)
Let me know if you have additional questions!
~Garebear
Answer:
30,000
Step-by-step explanation:
Okay so you know the formula. I would presume, so first you do 600 times 5 by doing just 6 times five which is 30 then adding the two zeroes back on. Then, proceed to multiply that by 10 by moving the decimal spot adding another 0. I hope this is correct.