Answer:
2x+5
Step-by-step explanation:
1+2(x+2)
1+2x+4
2x+5
The answer is the letter A! I hope this helps
Missing part of the question
Determine the number of handshakes, i, that will occur for each number of people, n, in a particular room. (people)
Answer:

Step-by-step explanation:
Given
For 5 people

Using the given instance of 5 people, the number of handshakes can be represented as:

The above sequence is an arithmetic sequence and the total number of handshakes is the sum of n terms of the sequence.

Where
--- The first term
--- The last term
So:


Answer:
9 is the right answer
Step-by-step explanation:
I. If c = - 4 and d = 10
then
= 
= 
= 9
Hope that help :D