Five over seven minus one over four?

Step-by-step explanation:

Based on how you're phrasing the question, you're asking for the value of  

First, figure out the smallest common denominator of 4 and 7.

This would be 28. Therefore, multiply each fraction by

3/5

step-by-step explanation:

double number line is not a standard concept, so it must have been defined in your textbook. assume top line is numerator.

b, i believe, but not sure.