Algebra help!! Link them up together of wich one is wich.

wich one is an equasion?

wich one is an expression?

wich one is an identity?

wich one is a formula?

3x'2-2x+1

(a-b)'2=a'2-2ab+b'2

3x2-2x+1=4x-2

v=u+1
_ at'2
2

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)

The first side of a triangle measures 5 in less than the second side, the third side is 3 in more than the first side, and the perimeter is 17 in. how long is the third side? if s represents the length of the second side, which of the following represents the length of the third side? s-5 ws-2 s+ 3 next question ask for turn it in

What is the equation of the parabola with focus (-1,-1) and directrix y=1?