Question

Please answer the clip above .​

Answer 1

Step-by-step explanation:

Given that ;

(55+ 3a) and ( 115-2a) are supplementary angles so their sum must be equal to 180degrees

( 55+3a)+(115-2a)=180

55+3a+115-2a =180

170+3a-2a=180

a=(180-170)°

a= 10°