. 7. A high school principal wants to predict the number of students who
will drop out of school so he can get funding for support services.
Year The number of
students who
He determined the equation that
drop out of high represents this data as y = -10x + 216,
school where x represents the years since
2004
217
2004, and y is the number of students
2005
202
who drop out.
2006
199
Use this equation to help him predict
2007
185
the number of students who will drop
2008
180
out in 2012?
2009
163
A) -20, 2996 students
B) 21 students
C) 136 students
D) 156 students

136 students

the axial of symmetry

step-by-step explanation:

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.