Answer:
A
Step-by-step explanation:
Given
20 - || - 13 | + 17 |
Note the absolute value function always returns a positive value, that is
| - a | = | + a | = a, thus
= 20 - | | - 13 |+ 17 |
= 20 - | 13 + 17 |
= 20 - | 30 |
= 20 - 30
= - 10 → A
The graphs are illustrations of biased and unbiased distributions.
The true statement is (d) R is biased, and W is unbiased
<h3>How to determine which of the graph is biased</h3>
From the graph, we have the following highlight
- The population parameter of graph R is at the right of the distribution
- The population parameter of graph W is at the center of the distribution
The above means that:
Graph R is biased, and graph W is unbiased
Read more about biased distributions at:
brainly.com/question/26415101
The solution to the answer is as follows:
<span>x - y = 1...[1],
2x + y = 19...[2], {[1]+[2]}---> 3x = 30,
ie., x = 10. C is correct answer.
</span>
I hope my answer has come to your help. God bless and have a nice day ahead!
