Answer:
20
Step-by-step explanation:
f(n)=n^2-n
f(-4)=(-4)^2-(-4)
f(-4)=16+4
f(-4)=20
Answer:
27a + 24b
Step-by-step explanation:
Combine the like terms.
9a + 4a + 5a + 9a = 27a
17b + 6b + b = 24b
Remember, a number without a coefficent is 1.
Hope this helps! :)
Answer: U=9
Step-by-step explanation:
I just answered this xD
1-3 is given as an example.
4. True
5. False. It is the same thing twice
6. True