ALGEBRAA!! HELP!!

Wich one is an identity, wich one is an equation, wich one is an expression and wich one is a formula?

3x+4y

3+2=5

A=bh

3x=15​

Respuesta :

3x+4y. is expression

3+2=5. is an identity

A=bh is a formula

3x=15 is equation

1. Expression
2. Identity
3. Formula
4. Equation