<u>ANSWER </u>

<u>EXPLANATION</u>
We the have the equations,

Multiplying through by negative one gives,

Also

and

Dividing through by 2 gives

Making z the subject gives,

Now we substitute equation (3) into equation (1) and (2)
Equation (3) in to equation (1) gives,

This implies that;


We now put equation (3) in (2) to get,

This implies that



But

So,




Dividing through by negative 9 gives

and


Therefore 
Answer:
10
Step-by-step explanation:
2 → $3500
? → $17500
? = 17500 x 2 / 3500 = 3500/3500 = 10
OR
3500 → 2
3500/2 = 1750
17500/1750 = 10
Therefore, whatever method you use, you will get 10 as an answer.
Answer:
9.72
Step-by-step explanation:
Answer:
39.25
Step-by-step explanation:
Area of the shaded part= Area of the Square - Area of the Triangle
Area of the Triangle= b*h/2= 2*3/2= 3
Area of the Square= side²= (6.5)²= 42.25
Area of the shaded part= 42.25 - 3= 39.25