3x+y-2z=22
x+5y+z=4
x=-3z
3(-3z)+y-2z=22
-9z+y-2z=22
-11z+y=22
-3z+5y+z=4
-2z+5y=4
-11z+y=22
-2z+5y=4
-55z+5y=110
--2z+5y=4
----------------------
-53z=106
z=2
-2(2)+5y=4
-4+5y=4
5y=8
y=1.6
x=-3(2)
x=-6
x=-6
y=1.6
z=2
Answer:
and ![x=-2](https://tex.z-dn.net/?f=x%3D-2)
Step-by-step explanation:
![\frac{x^2}{3x+14}=\frac{1}{2}](https://tex.z-dn.net/?f=%5Cfrac%7Bx%5E2%7D%7B3x%2B14%7D%3D%5Cfrac%7B1%7D%7B2%7D)
![2x^2=3x+14](https://tex.z-dn.net/?f=2x%5E2%3D3x%2B14)
![2x^2-3x-14=0](https://tex.z-dn.net/?f=2x%5E2-3x-14%3D0)
<-- Slide-and-divide method
![(x-7)(x+4)=0](https://tex.z-dn.net/?f=%28x-7%29%28x%2B4%29%3D0)
![(2x-7)(x+2)=0](https://tex.z-dn.net/?f=%282x-7%29%28x%2B2%29%3D0)
and ![x=-2](https://tex.z-dn.net/?f=x%3D-2)
Answer is #3. -30
Reason
1 and 2 are absolute values so they are 30, the 4th answer is plus or minus, the question says “below sea level” which is a negative number so it is -30.
1. 14 - 25/p
2. 3w + 4t
3. 13m + 14n
4. 2a . 5b