Marcy is concerned that her findings may be due to an extraneous uncontrolled variable and not her treatment. marcy is most concerned with:
a. triangulation.
b. respondent validation.
c. external validity.
d. internal validity.

What is the ratio of the change in y-values to the change in x-values for this function? a) 1: 13 b) 2: 5 c) 5: 2 d) 13: 1

Which of the following expressions is equal to 2x^2+8

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.