If sec = -12/13
what is the value of cos 0?

Which function has the smallest y-intercept value

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.

Write two subtraction equations that are equivalent to 5 + 12 = 17.