-k-(-8k)
= -k + 8k (two negatives equal one positive)
= 8k-k (flip it around because of the commutative property)
=7k (basic subtraction)
I really hope that helped :)
The statements that are true about this study are:
- This study uses random sampling.
-
This study uses a control group.
-
This study uses a repeated measures design.
Random sampling occurs when each sample has an equal probability of being chosen in a study.
This is seen in the random selection of 100 children. The Control group was used with the first group that had no screen time.
The repeated measures design was also used when multiple measurements were taken during different weeks.
Learn more about experiments here:
brainly.com/question/17216882
12multipliedby40tothedegreepowerwhichletsthemshowthatyoucansubtractanotherby12.sorryspacrbuttonisntworking
Answer:
2n - 7
Step-by-step explanation:
twice a number n is 2 times N
decreased by 7 means 2n - 7
hope that helped!!
