20. Find the midpoint between the given points. (3, -8) and (-5, -13)?

I need an answer fast! help if you can!

Hi there! :)

Use the midpoint formula to solve for the midpoint:

Plug in the points:

Simplify:

answer:

a=9

step-by-step explanation: lmk if you need a explanation

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.