Hey there!
When finding the difference of expressions like these, there's a few things you should keep in mind.
1. When finding the difference of two polynomials, multiply the polynomial that implied to be "negative" by –1 to expand the problem and make it easier to solve.
2. You combine terms based on their unknown terms, like x, y, x², ab, etc. You cannot combine the terms x and x², but you can combine the terms 6b and 8b by adding them.
3. You can rearrange your terms however you see fit. If a polynomial is implied as "positive", you can multiply that entire polynomial by +1 to get rid of the parentheses.
With all that in mind, you can go ahead and solve for your difference, like so:
![(ab+8a+1)-(-6ab+4)](https://tex.z-dn.net/?f=%28ab%2B8a%2B1%29-%28-6ab%2B4%29)
![(ab+8a+1) (-1(-6ab+4))](https://tex.z-dn.net/?f=%28ab%2B8a%2B1%29%20%28-1%28-6ab%2B4%29%29)
![(ab+8a+1) + (6ab-4)](https://tex.z-dn.net/?f=%28ab%2B8a%2B1%29%20%2B%20%286ab-4%29)
![ab+6ab+8a+1-4](https://tex.z-dn.net/?f=ab%2B6ab%2B8a%2B1-4)
![7ab+8a-3](https://tex.z-dn.net/?f=7ab%2B8a-3)
![7ab+8a-3](https://tex.z-dn.net/?f=7ab%2B8a-3)
will be your difference.
Hope this helped you out! :-)
It would be: 4 / 2/5
We can re-write it as:
4 * 5/2
= 20/2
= 10
In short, Your Answer would be: 10
Hope this helps!
Answer:
(a)
- Independent Variable- Dosage of Omega-3 Fatty Acids
- Dependent Variable - Number of news item remembered
(b)Discrete
(c)Ratio Scale and Discrete Variable
(d) Experimental Method
Step-by-step explanation:
The psychologist wants to evaluate the claim that omega-3 fatty acids can help improve memory in normal adult humans.
(a)In the study, the participants in the two groups were given fish extracts containing Omega-3 (500 mg) and no Omega-3 (0 mg).
The memory test involves measuring the number of items each participant remembers from the past three weeks of news.
Therefore:
- Independent Variable- Dosage of Omega-3
- Dependent Variable - Number of news item remembered
(b) The dependent variable is discrete since the number of news items remembered can only be whole numbers.
(c)The independent variable is in milligrams of Omega-3 where the placebo is 0 mg. This is a ratio scale since it has an absolute zero.
Since the dosage is given in multiples of 50mg, it is a discrete variable.
(d)Since the psychologist seeks to manipulate the conditions of the study by introducing Omega-3 to some of the participants and placebo to other participants, it is an experimental distribution.
Could just be used as a variable.