Eric has a limit of calories of:
![1500\leq\text{Eric}\leq300](https://img.qammunity.org/2023/formulas/mathematics/college/i5swdqyjsimzt5pqaf8fvm4cs9827fowtg.png)
The value of calories Eric eats in that day is given by:
![\text{Eric}=x+750](https://img.qammunity.org/2023/formulas/mathematics/college/7r7fxlwwm6ac1ia62nxky8njpgbd38jtek.png)
Where "x" is the value of the calories he can still eat. The inequality is:
![1500\leq x+750\leq3000](https://img.qammunity.org/2023/formulas/mathematics/college/32sopekzs3pz9yxz4gwmbx66v1up571z4v.png)
To solve it we need to break it into two inequalities.
![\begin{gathered} x+750\leq3000 \\ x+750\ge1500 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/860ow2jtde68fl7vvf69lypxltlq30fbvw.png)
We need to solve them individually.
![\begin{gathered} x+750\leq3000 \\ x\leq3000-750 \\ x\leq2250 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/k8vvhn6tfhha0gtxc3zsb5iuc1tahqj5l9.png)
![\begin{gathered} x+750\ge1500 \\ x\ge1500-750 \\ x\ge750 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/j996rb2p0lluss4t3pz8c2aqxnuj2fart2.png)
The result is:
![750\leq x\leq2250](https://img.qammunity.org/2023/formulas/mathematics/college/6djq0yckloy3lmeym0ffpwchc5asjkgcby.png)
Eric can eat between 750 and 2250 calories on that day.