Write each statement as a linear inequality in two variables.

1. The difference of the number of 100-peso tickets (p) and 50-peso tickets (q) is not less than 30.

2. Twice the number of cellphones (c) is less than the number of laptops (l).

3. The sum of one-peso coin (o) and five-peso coin (f) is greater than Php 45.

4. In a week, the total amount the student spends for food (f) and school materials (s) is at most Php 500.

5. The price of a bicycle (m) less Php 300 is less than or equal to the price of a helmet (h).

6. Nicole bought 3 soft drinks (s) and 4 bottled waters (b) and paid not more than Php 100.

7. The difference between the height of Ding (d) and Procopio (p) is at least 3cm.

8. Two times the length of a meter stick (m) increased by 2 centimeter is less than the height of Migz (h).

9. The number of slippers (s) more than twice the number of shoes (p) is greater than 6.

10. A dozen of t-shirts (t) added to half a dozen of sleeveless-shirts (s) has a total cost of not greater than Php 450.