Which description best defines mn ?

The set of point M ,point N and all the points between point M and point N.

Step-by-step explanation:

We know that in geometry, a part of a line that is bounded by two distinct end points is called a line segment. It contains every point on the line between its endpoints.

Therefore a line segment is a set of its distinct end points and all the points between the endpoints.

Thus, for given line segment is the set of point M ,point N and all the points between point M and point N.

75 tickets have been sold so far.

step-by-step explanation:

in this question it is clearly mentioned that 45 children's tickets have been sold and this number is 60% of the total tickets sold.

now let's assume the total number of tickets sold be x.

then 60% of x = 45

⇒

⇒ x(.6) = 45

by dividing with .6 on both the sides of the equation

⇒ x = 75

therefore 75 tickets have been sold so far.