Y=80x+270
If you want to know how to do it just let me know
Answer:
Step-by-step explanation:
We can write the following system of equations:
Adding both equations together, we isolate 
and get:
Plugging 
in any of the equations, we can solve for 
:
Verify that the solution pair 
works 
Therefore, the two numbers are 
.
Looks like the system is
We can eliminate by taking
so that 
, and
Substitute into this last equation and solve for :
Then
Plug these values into any one of the original equation to solve for :
Hence the solution is x = 4, y = -3, and z = 2.
The <em>correct answer</em> is:
400,000.
Explanation:
The third digit in 399 is 9. To round to this place value, we inspect the digit behind it. If the digit is 5 or greater, we round up; if it is less than 5, we round down.
The digit behind 9 is 7. Since it is greater than 5, we round up. This would ordinarily put the number up 1; however, doing that makes the 9 a 10, which in turn makes the next number 10, and the next number 4. This gives us 400,000.
