Answer and Step-by-step explanation:
We are told that AB is equal to 3x + 1.
BC is then half of AB, or
.
AC is then 4 less than BC, or
![((3x+1)/(2) ) - 4](https://img.qammunity.org/2021/formulas/mathematics/high-school/mdvc02tfmlt5jzg21i8ugl095s51fz6pri.png)
To find the perimeter, we add all of these together.
3x + 3x/2 + 3x/2 = 6x
1 + 1/2 + (1/2 - 4) = -2
The final answer is 6x - 2.
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