Answer:
Hence the expression 
Step-by-step explanation:
Explanation
- The given expression is (m+11)(m-4).
- We have to multiply the given expression.
- Multiply the (m+11) by -4, multiply the (m+11) by m then add like terms.

_____________

Answer:
the y intercept is 8
Step-by-step explanation:
Answer: 9
Step-by-step explanation:
Formula : Mean = 
Given: 5 students participated in a push-up competition.
The amount of push-ups each student completed is listed: 12, 7, 10, 11,5.
Mean = 

Hence, the mean number of push-ups = 9