Answer:

Step-by-step explanation:
We can start by combining like terms:

We want to isolate x, so we must add 3 and divide by -4:

Because we had to divide by -4, the inequality sign had to flip.
Answer:
2
Step-by-step explanation:
In function notation, f(x) equals the y value and the x equals the x value. So this question is asking you to find the value of y when x=-2. To do this find -2 on the graph and find the point with the same x value, then find what value of y it is on. In this case, f(-2)=2.
Answer:
20
Step-by-step explanation:
18000/30=600
600/30=20
Answer: No
Explanation: The relation is not a function because there is more than one output (y) for a single input (x).
Mathematics is not discovered, it is invented