HELP PLS. i do not know how to solve this.

X=50°

Step-by-step explanation:

Let, the fourth angle in the quadrilateral be ∠A

The sum of all the four angles of the quadrilateral is 360°

So 40° + 110°+80°+∠A=360°

230°+∠A=360°

∠A=360°-230°

∠A=130°

The fourth angle of the quadrilateral is 130°

The angle A and X are the angles on a straight line

The sum of the angles on a straight line is 180°

so, ∠A+∠X=180°

130°+∠X=180°

∠X=180°-130°

X=50°

Yo sup??

first we will find the missing angle of polygon

let it be y

y+110+80+40=360

y=130

now

y+x=180

x=180-130

=50

Hope this helps

21

step-by-step explanation:

11279

correct answer:

b.(19,-2)