4
Explanation:
I am not positive but it makes more sense
You have to note that pure substances can be elements or compounds. There is only one component all throughout. On the other hand, a mixture is a combination of different elements and compounds. They can appear in different phases. For example, air is a mixture. It is composed of pure substances of oxygen, carbon dioxide, and nitrogen.
No mathematics the most common way of solving an equation will be PEMDAS so the answer for your question will most likely be subtraction.
Answer:
Its Obviously Dinosaurs
Explanation: They died 65 million years ago
It’s a or b i think it’s b
