Answer:
i think {x,y} = {-5,-2}
Step-by-step explanation:

Step-by-step explanation:
So we go backwards, since we have x= 1/2 , 7

Now we have to foil to get the quadratic

We must simplify the terms

Our final result comes out to be

Answer:
Both questions are true.
Step-by-step explanation:
The general mathematical equation of a line can be written as
.
If we rearrange the two equations given in the question as follows:
and 
We can see that they follow the general equation we defined earlier so we can say that they represents linear lines.
The
given in the second question also represents a similar linear line with a different slope.
So the two questions are both true.
I hope this answer helps.
Answer:
120+100+120+120+x+x+10=720 (given)
470+2x=720
2x=720-470
x=250/2
x=125
Step-by-step explanation:
Matrix A was expressed in the form of a 2x2
i'm not sure if this helps or not but here you go