We are told that Johnathan works on IXL and learns new skills per week.
If Johnathan learns x new skills and he works y nights per week, the number of skills he masters per night, N, can be gotten using the equation:
From the question, we know that Johnathan works 5 nights per week and masters 7 skills over the week. This means that, for our equation, we have the following parameters:
Hence, we can calculate the number of skills mastered per night to be:
Therefore, Johnathan masters 1.4 skills per night.