The ratio of students to teachers at a school is 19:1 how many students are there in each total of people?
2 answers:
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Answer:
To make it clearer, I just put every thing under the formal form
f(x) =
Step-by-step explanation:
Now, you have 2 equations with 2 conditions. One is > -1, and one is < -1.
The question is about f (5). So, which equation you use to replace x = 5? The first one or the second one? and why?
Answering those questions help you understand how it works.