Answer:
-3
Step-by-step explanation:
I think that's it. I'm not sure.
Answer:
He made a mistake in his calculations when simplifying 5x - 2y
Step-by-step explanation:
Given
The coordinate pair

The equations


Dimitri's Solution








Required
Identify Dimitri’s mistake
In the first equation, Dimitri made no mistake.
However, he made a mistake when simplifying the second equation.
We have:

and

Substitute
and 
So, we have:

Open bracket

Finally, we have:

11/3 * 2/5 = 22/15 or 1.47