Kai, a seventh grader, wants to determine the average number of times the families in his neighborhood visit the pool during the summer. he samples the families of four of his classmates. which improvements could kai make to his sample to increase the validity of the results? check all that apply. sample more families/ sample families that have children who are not in seventh grade/ sample families that do not have children /sample families whose answer to the survey question is predetermined/ sample families living in every third house in the neighborhood

All the options are correct EXCEPT sample families whose answer to the survey question is predetermined

Step-by-step explanation:

Kai can implement following improvements to his sample to increase the validity of the results:

sample more families.

sample families that have children who are not in seventh grade.

sample families that do not have children.

sample families living in every third house in the neighborhood.

a. is correct

solve systems of equations by graphing. a system of linear equations contains two or more equations e.g. y=0.5x+2 and y=x-2. the solution of such a system is the ordered pair that is a solution to both equations. to solve a system of linear equations graphically we graph both equations in the same coordinate system