Answer:
This equation is true because when you flip it 5+4=9 it is the same. and 5+4=9
Step-by-step explanation:
9=5+4 5+4=9
Answer:
B
Step-by-step explanation:
A biased sample is a sample that does not accurately represent the population.
The survey asked only girls, but we can assume this school has both boys and girls. Therefore, by only asking girls, it creates a bias, because the boys in the school are not represented.
Therefore, the correct choice is B: biased sample.
I would need more information to help you. Like the numbers of hours worked, amount of money made, and the statements.