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earnstyle [38]
3 years ago
14

How many protons are in an element with an atomic number of 8 and a mass number of 18?

Mathematics
2 answers:
Orlov [11]3 years ago
8 0
A)8,atomic number also means proton number
aleksandrvk [35]3 years ago
4 0
Since the atomic number is 8 that will be the number of protons given that the element is a neutral element meaning that the number of protons and electrons are the same. Therefore the answer is 8
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Answer:

see below (I hope this helps!)

Step-by-step explanation:

The x seems to represent the number of months that Leslie has joined the gym for. When x = 0 (basically when she hasn't started using her membership), she pays 55(0) + 50 = $50 so we know that the 50 represents the one-time fee. The only thing missing is the monthly fee and since we haven't defined what the 55 means, we can conclude that the 55 represents the monthly fee. This makes sense because 55x is simply 55 times x, and since x is the number of months, 55 times that would be how much Leslie pays per month, otherwise known as the monthly fee.

8 0
3 years ago
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A

Step-by-step explanation:

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