Answer:
(a) 3, 5 and 6
Step-by-step explanation:
In the experiment, 43 are to be given a gel that contains the tooth-whitening chemicals while the remaining 42 are to be given a placebo. Therefore, a placebo is used.
The 43 that will receive the gel are to be selected randomly.
After the experiment, the whiteness of the two groups will be compared to see the effect of the gel.
Therefore for the experiment to be completely random, 3, 5, and 6 apply.
(b)
For the experiment to be double-blind, the researchers who will evaluate the whiteness and interact with the subjects, and the subjects would not know which subjects received either the whitening gel or the placebo.
Answer:
-3x + 12
Step-by-step explanation:
Distribute the 3 to the numbers in the parenthesis.
3x + 12 -6x
-3x + 12
Use a property that’s a good reason then tear it apart
Answer:
For anything you have to ask question, right? How can someone understand if you just show the figure
