1) All students in each grade 2)All students in each grade
Day 1 and Day 3 his score add up to zero.
Day 2 and Day 4 his score add up to zero.
Answer:
3=111
Step-by-step explanation:
Answer:
9 and 12
Step-by-step explanation:
hope this helps.
Answer:

Step-by-step explanation:
Given: 
To find: 
Solution:
From the image, 
Put 


Therefore,
