Questions like this ("how much higher is x than y?") are answered by computing the ratio of the two quantities.
In fact, for example, the answer to "how much higher is 10 than 5?" is 2, because 10:5 = 2, and indeed 10 is twice as much as 5.
So, we have

So, the melting temperature of platinum is about one time and a half higher than the melting temperature of gold.
Answer:
The guy above me was rude. The answer is A, C, D. I just got it right on my assignment.
Step-by-step explanation:
For the meme: no
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Yes, that is a solution to the system.