Close! You forgot to square the 20!
<u>Step-by-step explanation:</u>
How to solve for x?
Eliminate -(9/2) to find out the value of x.
<u>Add 9/2 to both sides of the equation:</u>

Answer:
All of the batches of the new blend of concrete made at their plant in a particular week.
Step-by-step explanation:
The population refers to all the subjects or data which which meets the condition or requirement of a certain experiment or research. This means that all the set of similar items or subjects which is of interest in a certain study is the population. In the scenario above, the population will be the set of all the new blend concrete which are made in the plant within a certain week. Thereafter, if a sample is required it will be drawn from these set of data or observation.
In order to do this, all you have to do is divide the area by the width
Step-by-step explanation:
r-5r-6s+8s-15
-4r+2s-15
= 2s-4r-15