Answer:
$5.50
Step-by-step explanation:
What you do is divide the amount you have ($11) in half.
You end up with $5.50

Add the numerators and keep the denominator:
Answer: Brian & Derek will earn $25 If they sell 8 and 12.
Step-by-step explanation:
After figuring out a common difference in this pattern, we can get further terms in the pattern:
1, -2, 2, -4, 0, -3, -1