A function is for every input, there is 1 output
aka
x never repeats with a different y
A. x doesn't repeat, it's a function
B. -8 repeats with 34 and 40, this is not a funciton (this is the answer0
C. x doesn't repeat, it's a function
D. x doesn't repeat, it's a function
answer is B
Answer:

Step-by-step explanation:
step 1
Find the lateral area
we know that
The lateral surface of a square pyramid is equal to the area of its four lateral triangular faces
so
![LA=4[\frac{1}{2}bh]](https://tex.z-dn.net/?f=LA%3D4%5B%5Cfrac%7B1%7D%7B2%7Dbh%5D)
where

----> slant height
substitute the values
![LA=4[\frac{1}{2}(25)(18)]=900\ m^{2}](https://tex.z-dn.net/?f=LA%3D4%5B%5Cfrac%7B1%7D%7B2%7D%2825%29%2818%29%5D%3D900%5C%20m%5E%7B2%7D)
step 2
Find the cost

Alright...
So 1 hour is 60 minutes
If one of the sections is 35 minutes, 60 - 35 = 25
<h2>
So he would need 25 minutes for the second section</h2><h2>
The equation would be 60 - 35 = 25</h2>
Answer:
7cm
Step-by-step explanation:
the explanation is in the picture
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The answer to the problem is D