Answer:
Step-by-step explanation:
D 5 BY 1000
FEEL FREE TO SAY IF I AM WRONG
BUT I HOPE THIS HELPED ANYWAY
First, multiply the first equation by 2.
That turns the first equation into:
6x - 2y = 18
That way it can easily be added to the second equation:
6x - 2y = 16
x + 2y = 5
---------------
7x = 21
==========
As you can see, the y disappeared, which was the objective of this operation.
Now the equations can be solved easily:
7x = 21
x = 3
Insert x=3 in the original equation:
3*3 - y = 8
9 - y = 8
9 = 8 + y
y = 1
So the result is:
x = 3
y = 1
7.2 * 10^−3 is how you would write 0.0072 in scientific notation
Answer:
11.625 or mixed number form 11 
Step-by-step explanation:
divide 46.5 by 4
