What are the domain and the range

The domain of a function is the complete set of possible values of the independent variable. In plain English, this definition means: The domain is the set of all possible x-values which will make the function "work", and will output real y-values.

Step-by-step explanation:

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A domain refers to the set of possible input values , A domain of a graph consist of all the input values seen on a X-axis . The range is the set of possible output values which are shown on the y-axis

Step-by-step explanation:

if a = 1,   and b = 2, then the answer is 47.99999999. if you round that to the nearest whole number, the answer is 48.

so, converting firstly the mixed fractions to improper fractions and then "adding".