Help me and show rough work please .

Question

First question:A cup holds 150 millilitres. How many cups of tea can be poured from a full teapot which holds 1.5 litres?

2. Put in order of size, smallest first: 2.2, 2.22,  2.199

3. Mom bought two pillows and paid with a €20 note. If she got one euro change, how much did each pillow cost?

Answer 1

1. 1 litre = 1000 ml

2. 2.199, 2.2, 2.22

3. 20 - 2x = 1

Solve for x.