sam conducted a survey to find out the favorite weekend activity of the students in his middle school. he asked 20 of his classmates. he found out that the favorite weekend activity of his middle school is playing video games because 75% of the students he surveyed liked to play video games. explain why sam’s sample may not be valid. provide 2 or 3 sentences of explanation with facts to support your answer. how could sam improve his survey to be more representative of his school?

So, Sam only asked 20 people in his entire middle school. That is a very small fraction of the amount of kids attending that school. He cannot say that video games is 75% of the entire school's favorite weekend activity if he only asked 20 people. To get a better, more valid result, he should ask around 100+ kids.

Step-by-step explanation:

above is right

Step-by-step explanation:

4400

step-by-step explanation:

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl