Answer:
6
Step-by-step explanation:
2x + 12 = 18
18 - 12 = 6
2x = 6
x = 3
Answer:
4
Step-by-step explanation:
I am not 100% sure but I really hope this helps you.
The second one because for every x value there is one and only one y value. If you plotted the points and graphed it, you would know it is not a function if it doesn't pass the vertical line test. Notice the same x values show up repeatedly in the other ordered pairs with different y values. Only one y value for every x value
