Question 1166859
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Apply the distance formula


    d = {{{sqrt((x[2]-x[1])^2 + (y[2]-y[1])^2)}}}.


In your case  ({{{x[1]}}},{{{y[1]}}}) = (7,-2),  ({{{x[2]}}},{{{y[2]}}}) = (11,-2).


OR, alternatively, you may notice that both points lie on the horizontal line y= -2.


It makes your calculations easier/simpler:  the distance between the poins is  11 - 7 = 4 units.
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Solved and explained.


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