layladuran2007 layladuran2007

28-10-2020
Mathematics

contestada

(-21) + (-9) =

A 30

B 33

C -30

Respuesta :

AnimeBrainly AnimeBrainly

28-10-2020

Answer:

-30

Step-by-step explanation:

Note the rules of signs. If one negative sign is directly next to a positive sign, it becomes a negative.

Subtract:

(-21) + (-9) = -21 - 9 = -30

C) -30 is your answer.

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