Answer: y=0 and x=3
Step 1: Solve for x in 2x+9y=6.

(Subtract 9y from both sides)
( Divide both sides by 2)
Step 2: Replace x with 3-4.5y

Step 3: Solve for y
(By looking at this, we can determine that y=0)
Step 4: Replace y with 0

(Divide both sides 2)
Therefore, y=0 and x=3
Answer:
![13*[4+(9-2)]=143](https://tex.z-dn.net/?f=13%2A%5B4%2B%289-2%29%5D%3D143)
Step-by-step explanation:
we have
![13*[4+(9-2)]](https://tex.z-dn.net/?f=13%2A%5B4%2B%289-2%29%5D)
step 1
Solve 

substitute
![13*[4+7]](https://tex.z-dn.net/?f=13%2A%5B4%2B7%5D)
step 2
Solve ![[4+7]](https://tex.z-dn.net/?f=%5B4%2B7%5D)
![[4+7]=11](https://tex.z-dn.net/?f=%5B4%2B7%5D%3D11)
substitute
![13*[11]](https://tex.z-dn.net/?f=13%2A%5B11%5D)
step 3
Solve 

therefore
![13*[4+(9-2)]=143](https://tex.z-dn.net/?f=13%2A%5B4%2B%289-2%29%5D%3D143)
Answer:
11.5
Step-by-step explanation:
using Pythagoras theorem
the square of 13 equals the square of 6 and the unknown side
Answer: x = 4
Step-by-step explanation: 4x^2−32x+64=0
4(x−4)(x−4)=0
x−4=0 x−4=0
x=4
Answer: The answer is in the attachment below!
the first one is -6, 8 second is 0,8!