А В
48°
684
2430
E
D
ABD is an isosceles triangle with AB = DB.
DCE is a straight line.
Angle ABD = 48
Angle BCE = 689
Reflex angle ADC = 243
Work out the size of the angle marked y.

answer is the third choice:

3x^5+4x^4+x^3+2x^2-10x-7=0

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.

i think it will be zero as slope has a formula of difference between initial and final distance divided by itz time interval

answer: y=0 if that is what u r looking for