The answer would be 8 132/999. I don't know if you can simplify it but see if you can.
We know f(x)=5x+1. Plug in f(x) in the g(x) function.
We get
![g(x)=2(5x+1)+5](https://tex.z-dn.net/?f=g%28x%29%3D2%285x%2B1%29%2B5)
Distribute the 2 to 5x and 1.
![g(x)=10x+2+5](https://tex.z-dn.net/?f=g%28x%29%3D10x%2B2%2B5)
Simplify to get
![g(x)=10x+7](https://tex.z-dn.net/?f=g%28x%29%3D10x%2B7)
Now, we plug in -1 for x.
![g(-1)=10(-1)+7](https://tex.z-dn.net/?f=g%28-1%29%3D10%28-1%29%2B7)
![g(-1)=-10+7](https://tex.z-dn.net/?f=g%28-1%29%3D-10%2B7)
A number x divided by -1 is at least -4.
x / -1 ≥ -4
Multiply both sides by -1.
x ≤ 4
Remember, when multiplying or dividing by a negative, you must change the sign's direction.
~Hope I helped!~