Let:
v = Olga's speed
t = the time Anna spent going to school (3 km/hour)
t/2 = the time Anna spent running back home with speed of 6 km/hour
So, t + t/2 = 3t/2 is the total time
In the meantime distance = speed*time and the both made the same distance we can put it as:
3t + 6*(t/2) = (3t/2)*v
6t = (3/2)tv divide both sides by t
(3/2)v = 6
v = 2*6/3
v = 4 km/hour
Olga's speed was 4 km/hour.
Solutions
one decimal place means one digit after the point.
4.93 is two decimal place.It has two digits after the point.
one decimal place would be 4.9. There is one digit after the point.
Answer:
Step-by-step explanation:
Let
n-------> the number
we know that
The expression "the difference of seven and a number squared" is equivalent to the algebraic equation