(+72) - (-18) =
H what do i do

90

Step-by-step explanation:

Positive 72 - (-18), is the same as 72 + 18, because two negatives cancel out and is the same as if you were adding. In other words, if you subtract a negative number, you are contradicting the negative, so you have one positive.

Hopefully that will help. :)

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.