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Pearson Geometry Common Core, 2011 View details

Cumulative Standards Review

Exercise 17 Page 136

Use the Midpoint Formula.

1.5

Practice makes perfect

To find the midpoint, we can use the Midpoint Formula. M(x_1+x_2/2,y_1+y_2/2)The coordinates of the given endpoints are (0,-4) and (-4,7). Let's use these to find the coordinates of the midpoint.

M(x_1+x_2/2,y_1+y_2/2)

SubstitutePoints

Substitute ( 0,-4) & ( -4,7)

M(0+( -4)/2,-4+ 7/2)

AddNeg

a+(- b)=a-b

M(0-4/2,-4+7/2)

AddSubTerms

Add and subtract terms

M(-4/2,3/2)

CalcQuot

Calculate quotient