Well it is true if the problem is the right with the right answer. If not you have a false eqaution.
-11 because first you add -4 and -7 because when you subtract negatives you add I hope I helped and have a good day
Answer:
Cross-sectional
Step-by-step explanation:
Cross sectional study is a type of observational study that analyzes data from a population of a representative subset at a particular point in time.
Answer:

Step-by-step explanation:
The question we have at hand is, in other words,
- where we have to solve for the value of 
If we have to isolate
here, then we would have to take the inverse of the following matrix ...
... so that it should be as follows ... 
Therefore, we can conclude that the equation as to solve for "
" will be the following,
- First find the 2 x 2 matrix inverse of the first portion,
=
=
=
At this point we have to multiply the rows of the first matrix by the rows of the second matrix,
,
- Simplifying this, we should get ...
... which is our solution.
Answer:
Please go more into depth with this question