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

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. a city water tank holds 20 gallons of water. a technician empties 25% of the tank. how many more gallons of water must be removed from thetank so that it has 5 of the water that it started with: the technician must removemore gallons of water for the tank to have 5 of the water that it started with.

Which equation can be simplified to find the inverse of y = 2x2^2