Answer:
40/30
Step-by-step explanation:

Answer:
36
Step-by-step explanation:
Step-by-step explanation:
Her father is 34 years old
Answer:
pure substance! I checked.
Step-by-step explanation:
In chemistry, a substance is pure if it has a homogeneous chemical composition. ... Examples of pure substances include iron, steel, and water. Air is a homogeneous mixture that is often considered to be a pure substance.