Since you already know the solution, you need to substitute every occurrence of x and y with those values: the first equation checks out, because it becomes

The second becomes

The inequality is 4 ≥ x/2.1, and the answer is 8.4 ≥ x (or x ≤ 8.4).
To solve this, we multiply both sides by 2.1:
4*2.1 ≥ x
8.4 ≥ x.
Answer:
1. $50+$20x
2. 3 hours
3. $170
Step-by-step explanation:
I am not gonna explain so, don't ask.
Check the picture below.
make sure your calculator is in Degree mode.