Dr. tucker and his research team are interested in how aggression changes as we age. the team will recruit 100 3-year-old children and assess their levels of aggression every three years until the participants turn 21. this is an example of cross-sectional research. true or false?

False

Step-by-step explanation:

A cross sectional research examines changes between different population in a specific period of time. In this case the investigation of Dr. Tucker, is a longitudinal research. This research analyses changes in the same population in different periods of time which can provide data of changes of behavior of children over the time.

the answer is 5636.7

8(-10x+3.5y-7)

8×-10x + 8×3.5y + 8×-7

-80x + 28y - 56

therefore

-80x+28y-56 is the correct answer