madisonc100 madisonc100

09-03-2021
Mathematics

contestada

The number of students at a high school was decreased by 30% to 420 after the senior students graduated how many students were at the high school before the decrease

Respuesta :

09-03-2021

Answer:

Step-by-step explanation:

s(1-30/100)=420

s(100-30)/100=420

s(70/100)=420

s(7/10)=420

7s=4200

s=600

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