Find the value of the number (a) such that the families of curves y=(x=c) and y=a(x=K) are orthogonal trajectories.

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

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?