Subtract 20 and 10. To get your answer
Answer:
4.87500
Step-by-step explanation:
hope this helps
Statistic significance requires that your sample be representative of the population, but I'm struggling with this because if the class is an elective then the answer would be: <span>No, it is not a valid inference because she asked all 22 students in her science class instead of taking a sample of the students in her school.
BUT if the class is required, as most science classes are, then it WOULD be a random sample of the school. So the last option would be correct.
My guess though is that the teacher is looking for answer B.
</span>
2x+3 = 4x+7
-4 = 2x
x = -2
