Answer:
It is perpendicular
Step-by-step explanation:
Answer: 4
-5+4=-1
-1+4=3
3+4=7
I hope this is good enough:
The formula for this is A= a + b/2 x h.
Answer:

Step-by-step explanation:
Given

i.e. first to fifth
Required
Determine number of selection
1st position = Any of the 30 students
2nd position = Any of the 29 students
3rd position = Any of the 28 students
4th position = Any of the 27 students
5th position = Any of the 26 students
Number of selection is then calculated as:

