P(35) = -9p + 4 = -9(35) + 4 = -315 + 4 = -311
p(28) = 5p - 17 = 5(28) - 17 = 140 - 17 = 123
a + 34d = -311
a + 27d = 123
7d = -434
d = -62
Therefore, the commpm difference is -62.
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:


Hi! So first thing you need to do is distribute 3 through the parentheses! Then once you solve that, that is your simplified equation!
Please give brainliest!❤️