6. Calculate the number that you need to add to each side of the equation *2- 3w = 350 to create a perfect square trinomial. Add this number to each side
of the equation. Show your work.

The correct answer will be option-

1. Independent Variable: brands of shampoo

2. Dependent Variable: shining of the hair

3. Control: sample without any treatment of shampoo.

4. Constant: amount of water and the shampoo

Step-by-step explanation:

In a scientific experiment, three important types of  variables are studied which are:

1. Dependent Variable: The variable which has to be studied in the experiment which in the given question is the shining of the hair

2. Independent Variable: the variable which when modified control and influences the dependent variable which is brands of shampoo

3. Constant: The variable which remains same or constant throughout the experiment which is the amount of water and the shampoo

Also, the samples of an experiment are divided into two groups:

1. Experimental group: samples in which the variable to be studied is included

2. Control group: the group in which the key variable is not present and thus acts as a reference to the experimental group like the sample without any treatment of shampoo.