Which number makes the number sentence true? (6+9)+4=4+?

Answer

(6+9)+4=4+15

Step-by-step explanation:

First you would do (6+9) because it's in parenthesis. (6+9)= 15. So now our equation looks like 15+4=4+? Next we will do 15+4=19. 19=4+? is the new equation. Now the final step is to do 19-4=15 which is what we will plug into the equation.

21

step-by-step explanation:

11279

i belive those are the ones that are under 90 degreese.