Answer:
This system has infinite solutions and it would be much easier to solve it by elimination but substitution it is.
Step-by-step explanation:
-3x+3y=9
-x+y=3
Isolate either x or y in any of the equations. I'll go with the second.
y = 3+x
Now substitute this for y in the first equation.
-3x+3(3+x)=9
Distribute the 3
-3x+9+3x=9
Combine like terms:
9=9
0=0
It's infinite
If the rectangle has a length of 3.6 inches, and a perimeter of 16.8
inches, the width will be 4.8, which we can work out by taking away the
amount we already know from the perimeter, which will of course be 3.6 x
2 (7.2) to get 9.6. This is the combined length of the remaining widths
within the perimeter added together, so to find the width along, you
simply need need to halve 9.6 to get 4.8.
The answer is d... because 7x is seven times a number, and it is saying 3 minus 7 times a number.. hope i helped.
Answer:
b
Step-by-step explanation: