Angles Look at picture

x=47°

y=43°

z=133°

Step-by-step explanation:

x=x

z=3x-8

x+3x-8=180

4x-8=180

4x=188

x=47

z=3x-8=3(47)-8=141-8=133

y=90-x=90-47=43

for finding the midpoint of any given 2 pair of points simply add the respective x coordinates with other x coordinate and the y coordinate with other y coordinate and divide them by 2

in your question it will be :

(3+1)/2 for the x coordinate of mid point i.e 2

[8+(-4)]/2 for the y coordinate of midpoint i.e 2

so coordinates of mid point of points (3,8) and (1,-4) will be (2,2)