1 + 1 _?
Will give you brainliest if you get it right.

3

Step-by-step explanation:

let's take 0 = 0

now,

=》0 = 0

=》4 - 4 = 6 - 6

( since, 4 - 4 = 0 and 6 - 6 = 0 )

=》2 (2 - 2) = 3 (2 - 2)

( taking 2 as common in L.H.S and 3 as common in RHS )

=》2 = 3

( Dividing both sides by (2 - 2) )

=》1 + 1 = 3

i hope this helped

this answer is !

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.