Find the coordinates of the circumcenter of def with coordinates d(1,3) e(8,3) and f(1,-5). show your work

As shown in attached figure C is the circumcenter of triangle DEF

First find midpoint of DF using mid point formula

----------------------------(1)

for two points and

so mid point M of D(1,3) and F(1,-5) will be

M : (1,-1)

Find slope of DF using slope formula

-----------------------------------------(2)

So slope of D(1,3) and F(1,-5) will be will be

Now line CM is the perpendicular bisector of line DF. So slope of line CM will be negative reciprocal of slope of DF

So slope of CM will be or simply 0

So now we will write equation of line CM using slope m =0 and passing through mid point M (1,-1) using formula

on plugging values we get

y + 1 =0

y +1 -1 = 0 -1

y = -1 ---------------------------------------------------(3)

So thats the equation of line CM

Similarly now line midpoint N of line DE using mid point formula from (1)

so mid point N of D(1,3) and E(8,3) will be

N : (4.5,3)

Find slope of DE using slope formula in (2)

So slope of D(1,3)) and F(8,3) will be will be

or simply 0

Now line CN is the perpendicular bisector of line DE. So slope of line CN will be negative reciprocal of slope of DE

So slope of CN will be be reciprocal of 0 which is undefined when 0 goes in denominator. All undefined slope lines have equation of form for point on it

So for line CN with undefined slope and passing through point (4.5,3) its equation will be

x = 4.5 ----------------------------------------------------------------------------(4)

Solving equations (3) and (4) we get coordinates of intersection point C which will be

x=4.5, y =-1

so answer for circumcenter C coordinates will be (4.5,-1)

the answer is a

step-by-step explanation:

the results from a pre-test for students for the year 2000 and the year 2010 are illustrated in the box plot. what do these results tell us about how students performed on the 29 question pre-test for the two years?

if we compare only the lowest and highest scores between the two years, we might conclude that the students in 2010 did better than the students in 2010. this conclusion seems to follow since the lowest score of 8 in 2010 is greater in value than the lowest score of 6 in 2000. also, the highest score of 28 in 2010 is greater in value than the highest score of 27 in 2000.

but the box portion of the illustration gives us more detailed information. the middle bar in each box shows us that the median score of 20 in 2000 is greater in value than the median score of 17 in 2010. further, we note that the box and whiskers divide the illustration into four pieces. each of these four pieces represents the same portion of students. so, the upper half of the students in 2000 scored in the same score range as the upper one-fourth of the students in 2010, see the illustration at a score of 20.

by considering the upper one-fourth, upper half, and upper three-fourths instead of just the lowest and highest scores, we would conclude that the students as a whole did much better in 2000 than in 2010. we would conclude that as a whole the students in 2010 are less prepared than the students in 2000.

in this section, we discuss box-and-whisker plots and the five key values used in constructing a box-and-whisker plot. the key values are called a five-number summary, which consists of the minimum, first quartile, median, third quartile, and maximum.

step-by-step explanation: