A researcher interested in identifying what smartphone technology aids student comprehension of college-level coursework would best be served by using research.

Applied Research

Step-by-step explanation:

-Applied Research is a methodology used to solve a specific issue affecting an individual or group.

-The researcher has identified a specific group, college students, and the subject issue as coursework comprehension.

-The researcher aims to find solutions that may improve this issue or develop new strategies post-study.

step-by-step explanation:

jjj

he used the algebra tiles correctly.

step-by-step explanation:

given : 3x(2x-1)

solution :

since he used algebra tiles .

armando's solution is the same in the solution shown in figure

as he distributed 2x into x and x and wrote them vertically

and also write   -1 vertically

and 3x into x and x and x and wrote it horizontally

performing the multiplication in the algebra tiles we get

and solving the given expression :

3x(2x-1)

since solving the expression using tiles   and solving the expression algebraically we get the same answer

thus   we can choose the first statement as the answer to this problem which is "he used the algebra tiles correctly".