Perry was 31 years old four years ago. how old is he now?

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?

Do more republicans (group a) than democrats (group b) favor a bill to make it easier for someone to own a firearm? two hundred republicans and two hundred democrats were asked if they favored a bill that made it easier for someone to own a firearm. how would we write the alternative hypothesis?

Labc is reflected across x = 1 and y = -3. what are the coordinates of the reflection image of a after both reflections?