Question 1015786
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A.
Point A is red, Point B is green
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{{{drawing( 300, 300, -5, 5, -5, 5, grid( 1 ), red(circle(2,3,0.15)), green(circle(-1,-4,0.15)))}}}
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Point A=({{{x[1]}}},{{{y[1]}}})=(2,3)
Point B=({{{x[2]}}},{{{y[2]}}})=(-1,-4)
d=distance
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{{{d=sqrt((x[2]-x[1])^2+(y[2]-y[1])^2)}}}
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{{{d=sqrt((-1-2)^2+(-4-3)^2)}}}
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{{{d=sqrt((-3)^2+(-7)^2)}}}
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{{{d=sqrt(9+49)}}}={{{sqrt(58)}}}
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ANSWER: Distance between A and B is {{{sqrt(58)}}}
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C).
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midpoint=({{{(x[1]+x[2])/2}}},{{{(y[1]+y[2])/2}}})
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midpoint=({{{(2+(-1))/2}}},{{{(3+(-4))/2}}})
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midpoint=({{{1/2}}},{{{-(1/2)}}})