Help asap please with calculations pls pls pls

For the first one it is y = -5x because for it to be direct it can't have a b-intercept. it must start at 0.

Second question: y2 - y1/x2 - x1

13-(-8)/(-4)-3

21/(-7)

-3 is the slope

y= -3x + b

13 = -3(-4) + b

13 = 12 + b

12 - 13 = b

b = -1

y=-3x-1

0 = -3x - 1

1 = -3x

1/-3 = -3x/-3

x= -1/3

y=-3x-1

y=-3(0)-1

y= -1

The answer to the 3rd question is y = 1x + 2 because the rise over run is one and the line crosses the y-intercept at 2.

I am not sure if these answers are correct.

answer: the answer is 127 degrees

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.