Answer:
D
Step-by-step explanation:
to be a function you cannot have different y values for the same x, in B for example when x = 3 you have two different values for y (3,7) and (3,8)
D is the only choice where each value of x only has one value for y
Answer:
5
Step-by-step explanation:
We desire to evaluate the fraction: 
when k=3.
This is a simple substitution, so what is required is
- Replace k with the given number
- Simplify the resulting expression
Therefore, when k=3
You can try the same for any value of k.
Answer:
Step-by-step explanation:
-20
Explanation:
(
−
7 ^
2 − 4
) + (
−
7 ^
2 − 6
−
2
)
Eliminate the redundant parentheses, subtract the numbers which will get you, combine like terms, rearrange terms, then your solution is:
−
1
4
2
−6
−6
Figure that problem out then you will get -20.
