Answer:
The constraints are
![9x+12y\leq 180](https://img.qammunity.org/2020/formulas/mathematics/high-school/th9ra56excsod25bqvbplkkskeguabolur.png)
![y\geq 6](https://img.qammunity.org/2020/formulas/mathematics/high-school/dq76qyzadjtxocqd87u8k857xtife0psdr.png)
![y\geq x](https://img.qammunity.org/2020/formulas/mathematics/high-school/5kkvxk3lnqw4gtto8c0jhysx1pk10n8wti.png)
![x \geq 0](https://img.qammunity.org/2020/formulas/mathematics/college/zoax1rk4q6hahwulcluk1s5sxdxfzhin1h.png)
Explanation:
Let
x------> the number of visors
y------> the number of caps
we know that
----> inequality A
-----> inequality B
----> inequality C
-----> inequality D (the number of caps can not be negative)
using a graphing tool
The solution is the shaded area
see the attached figure