Ateacher wants to know whether the students in the entire school prefer watching television or playing outdoor games after school. the teacher draws a random sample from the following groups:
all school teachers
all students on the football team
all boys in each grade
all students in each grade

which of the following groups best represents the population from which the teacher should take a random sample to get the best results for her survey?

all school teachers
all students on the football team
all boys in each grade
all students in each grade

All students in each grade.

Step-by-step explanation:

The teacher does not want now about specific types if students like boys or students on the football team. The teacher also does not want to know about school teachers, she wants to know about students at random so she can get a more accurate sample.

answer: option a.

step-by-step explanation:

you know that the quadrilateral opqr ( a four sided figure) is inscribed in circle. this means that all its vertices are on the circle.

then, by definition, the opposite angles of the quadrilateral are supplementary, this means that the sum of their measures is 180 degrees.

you can observe in the figure that the angles ∠opq   and the angle ∠orq   are opposite, therefore:

then, can be used to d to calculate the measure of ∠opq