Find the angle that makes them supplementary. ∠3=50 so ∠4=
∠5=70 so ∠6=
∠7=140 so ∠8=
∠9=90 so ∠10=
∠11=115 so ∠12=
here are the matching answers 110,90,65,130,40

∠3=50 so ∠4= 130

∠5=70 so ∠6= 110  

∠7=140 so ∠8= 40

∠9=90 so ∠10= 90  

∠11=115 so ∠12= 65

Step-by-step explanation:

The supplementary angles are the angles that can add till 1810 degrees

Now

∠3=50 so ∠4= 180 - 50 = 130  

∠5=70 so ∠6= 180 - 70 = 110

∠7=140 so ∠8= 180 - 140 = 40

∠9=90 so ∠10= 180 - 90 = 90

∠11=115 so ∠12= 180 - 115 = 65

So,

∠3=50 so ∠4= 130

∠5=70 so ∠6= 110  

∠7=140 so ∠8= 40

∠9=90 so ∠10= 90  

∠11=115 so ∠12= 65

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.