Answer:
The answer is A.
Step-by-step explanation:
So we have the two equations:
![3x+y=1\\y+4=5x](https://tex.z-dn.net/?f=3x%2By%3D1%5C%5Cy%2B4%3D5x)
To make a substitution of the second equation into the first equation, we need to isolate the <em>y </em>variable in the second equation. Thus:
![y+4=5x\\y=5x-4](https://tex.z-dn.net/?f=y%2B4%3D5x%5C%5Cy%3D5x-4)
Now, we can substitute this into the first equation. Therefore:
![3x+y=1\\3x+(5x-4)=1\\3x+5x-4=1](https://tex.z-dn.net/?f=3x%2By%3D1%5C%5C3x%2B%285x-4%29%3D1%5C%5C3x%2B5x-4%3D1)
Answer:
9+1 = 10, 9+4 is not correct because it does not equal 10.
Step-by-step explanation:
Answer:
The top one
Step-by-step explanation:
Since 2000 is closer to the origin than 2500, only the one top two could be the answer. And since 150 is less of an increase than 212 it would only leave the top one as a possible answer.
Hope this helps!
Answer:
V = 240 ft3
Step-by-step explanation:
The explanation is in the screenshot below:
When you first pick a ticket, there are 2 winning tickets and 40 total tickets. This means that there is a 2/40 chance of your ticket being a winning one. This fraction can be reduced to 1/20.
After this, there will be 1 winning ticket left and 39 total tickets. There is a 1/39 chance of the next ticket being a winning one. We multiply these two fractions together to get our answer. 1/20 * 1/39 = 1/780, so there is a 1/780 chance of having 2 winning tickets.