Which is the best first step when solving the following system of equations? x + y = 3. 4 x minus y = 7. 1) Multiply the first equation by 4. 2) Add the first equation to the second equation. 3) Multiply the second equation by Negative 1. 4) Subtract the second equation from the first equation.

its 8

step-by-step explanation:

answer is 144

step-by-step explanation:

207/8 is the right

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.