Respuesta :

Answer:

C, D

Step-by-step explanation:

C and D is a algebraic equation, and equations have an equal sign, which is all it needs to prove it is a mathematical sentence.

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AP3623

Answer:

C and D

Step-by-step explanation:

Both C and D have equals signs and variables, but they don't have to have variables. All you need is an equals sign.

Q&A Education