If the bus is on time to the school 90% of the time, how many days can the school expect the bus on time out of 160 days?
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We need to solve for x, we need to get x alone
Lets start by removing -5
Add 5 on both sides
Now to isolate x , we need to remove the square from x
To remove square , take square root on both sides
square and square root will get cancelled
So and