Answer:
![\left\{\begin{array}{l}x+y\le 450\\7x+4y\le 1,150\end{array}\right.](https://img.qammunity.org/2020/formulas/mathematics/middle-school/42axxhoikuvoc52kxh3dikaw1es5m1fdr6.png)
Explanation:
Let x be the number of adults and y be the number of campers.
There are rooms for 450 people, so
x+y≤450.
Each adult costs $7, then x adults cost $7x.
Each camper costs $4, then y campers cost $4y.
There is a maximum budget of $1,150, so
7x+4y≤1,150
Hence, you get the system of two inequalities:
![\left\{\begin{array}{l}x+y\le 450\\7x+4y\le 1,150\end{array}\right.](https://img.qammunity.org/2020/formulas/mathematics/middle-school/42axxhoikuvoc52kxh3dikaw1es5m1fdr6.png)