Final test of the 9th Grade
What is the intersection of the intervals
Determine the solutions of
The solution(s) of the equation
Is the function
Determine the set of solutions of the following inequation
How much is
Are the vectors
Are the points
on a line ?
Are two orthogonales lines always perpendicular ?
In a class, 10 pupils are between 1,50m and 1,60 m tall, 16 pupils are between 1,60m and 1,70m tall, 6 pupils are between 1,70m and 1,80m tall. What is approximately the average height of the pupils ?