5x+y=8 equation 1
x+2y=5 equation 2
Subsitute (1,3) in bothe equations if the right side is equal to.the left side of the equation then (1,3) is a solution
5(1)+3=8
1+2(3)=7
7 isn't equal to 5 so 1,3 is NOT a solution for this system of equations
Answer: ![(f+g)(x)=5x^2-2x-7](https://tex.z-dn.net/?f=%28f%2Bg%29%28x%29%3D5x%5E2-2x-7)
Step-by-step explanation:
![f(x)=3x^2+x-14\\g(x)=2x^2-3x+7](https://tex.z-dn.net/?f=f%28x%29%3D3x%5E2%2Bx-14%5C%5Cg%28x%29%3D2x%5E2-3x%2B7)
![(f+g)(x)=3x^2+x-14+2x^2-3x+7\\(f+g)(x)=5x^2-2x-7](https://tex.z-dn.net/?f=%28f%2Bg%29%28x%29%3D3x%5E2%2Bx-14%2B2x%5E2-3x%2B7%5C%5C%28f%2Bg%29%28x%29%3D5x%5E2-2x-7)
Answer: Age of Lin is 12
Solution:
Let X= age of Maya
(X/2)+4= age of Adrian
((X/2)+4)-7= age of Lin
X+(X/2)+4+((X/2)+4-7)=61
X+.5X+4+.5X+4-7=61
2X+4+4-7=61
2x=61-8+7
2X=60
X=30 age of Maya
19= age of Adrian
Age of Lin is
=((X/2)+4)-7
=15+4-7
=12
To check if this is correct
<span>30+19+12=61</span>
Foundry is what you get when you smelt iron :)