Answer: Null hypothesis :
Alternative hypothesis : 
Step-by-step explanation:
Given claim : The proportion of U.S. adults age 25 or older who smoke : 
A researcher suspects that the rate is lower among U.S. adults 25 or older who have a bachelor's degree. i.e. 
Since the null hypothesis is a fact checked by the researcher or the experimenter that always contains a equals to sign.
∴ Null hypothesis :
Alternative hypothesis : 
I think the word you're looking for is congruent. Congruent angles always have the same angles.
Use the trick x+ y+ z =0 and 6+8+z=0,...so z= -14