15h + 80 = 140
If you wanted to solve how many hours he worked:
15h + 80 = 140
15h = 60
h = 4.
Answer:
D.
Step-by-step explanation:

Answer:
7x3=21
Step-by-step explanation:
pls mark Brainliest :)
The photo is upside down btw
We have x = 4 repeating itself
If we graph the two points (4,1) and (4,20), then we see the relation fails the vertical line test.
The input x = 4 leads to more than one output y = 1 and y = 20 simultaneously.
This is why we don't have a function.