1.
Let x be the no. of disposable face masks
Let y be the no. washable face masks
15x + 30y ≥ 500
(kasama dito ung graph)
2.
120x + 45y ≤ 1,000
(sorry di ko po sure)
3.
800x + 200x ≥ 10,000
1,000x ≥ 10,000
[tex]\frac{1000x}{1000} \geq \frac{10,000}{1000}[/tex]
x ≥ 10 days
4.
3,500 + x ≤ 15,000
3,500 + x - 3,500 ≤ 15,000 - 3,500
x ≤ ₱11,500
