Answer:
the answer is d
Step-by-step explanation:
the x values don't repeat so therefore It is a function.
No because that would just be measuring freshman a better sampling method would be surveying the same number of students for each grade
Answer:
the answer is 40%
Step-by-step explanation:
Answer:
2.
30-7x4 = 2
3.
80
Step-by-step explanation:
2.
First, do 7x4, which equals 28. Then subtract that from 30, and you get 2.
3.
Do the parentheses first, 21-6=15. Then 15 divided by 0.2 = 75. 75+5=80.
Sorry I couldn't help on any of the other ones, I don't have much time.