Answer:
2
Step-by-step explanation:
Step-by-step explanation:
n2+5=21
n2 =21-5
n2 = 16
n =16/2=8
Answer:
60
Step-by-step explanation:
60* of the circumference would be 60-the total circumference.
The return trip was 21.2 hours long.
Step-by-step explanation:
Given,
Speed of plane from US = 212 mph
Speed of plane on return trip = 232 mph
Let,
x be the time taken on return trip.
Time taken from US = x+2
We know that;
Distance = Speed * Time
Distance of plane from US = 212(x+2) = 212x+424
Distance on return trip = 232x
As the distance will be same, therefore,

Dividing both sides by 20

The return trip was 21.2 hours long.
Keywords: distance, speed
Learn more about speed at:
#LearnwithBrainly
Answer:
100.
Step-by-step explanation:
25%*400
=100
¡Espero que esto haya ayudado!