Respuesta :

Answer:

3. 16800

4. 42

Step-by-step explanation:

3. 400*42 = 16800

4. h = [tex]\frac{336-840}{-12}[/tex] = 42
Q3
m=400*42
m= 16800
Answer 16800
Q4
-12h+840=336
-12h=-504
h= 42
Answer 42

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