Which expressions are equivalent to x + 2y + x + 2? Choose all answers that apply:

A 2(x+y+1)
B 2x + 4y +4
C None of the above

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.

Acircle has a circumference of 28.36 units what is the diameter of the circle

Aregular pentagon with a perimeter of 21 inches is dilated by a scale factor of 5/3 to create a new pentagon. what is the perimeter of the new pentagon?